page 1 1 Wednesday, 18th November 2009 2 (9.37 am) 3 PAUL CHAMBERLAIN, sworn 4 Examined by MR MOYNIHAN 5 THE CHAIRMAN: Your full names for the record, please. 6 A. Paul Chamberlain. 7 THE CHAIRMAN: Take a seat, please, Mr Chamberlain. 8 MR MOYNIHAN: Good morning, Mr Chamberlain. 9 A. Good morning. 10 Q. You have helpfully provided for the Inquiry a statement. 11 Do you have a copy of that? 12 A. I do indeed, yes. 13 Q. For others the statement is FI0136 but we will not need 14 to bring it up. It is a statement you have signed and 15 you are therefore content that what you have set out was 16 the truth as best you could in that statement? 17 A. Yes, indeed. 18 Q. What we will do is as we proceed I may make some 19 references to your statement. If there are matters that 20 require adjustment in your statement, please just 21 indicate so because what we are interested in is the 22 accurate evidence that you can give today? 23 A. Okay. 24 Q. Your own background, you come now from a company, that's 25 the Forensic Science Services Limited? page 2 1 A. Yes, the Forensic Science Service Limited is 2 a Government-owned company, a major supplier of Forensic 3 Services in England and Wales and to other investigative 4 agencies throughout the world. 5 Q. You yourself are a forensic scientist but you practice 6 exclusively in relation to fingerprints? 7 A. That's correct. My specialism is fingerprints. 8 Q. Do you have both a research and a practical interest? 9 A. I have a role to play in research which is mostly around 10 taking research and deploying it into practical 11 casework. I don't actually undertake research myself 12 and my other roles are round quality management and I 13 still undertake casework on a regular basis. 14 Q. Do you still, on a regular basis, give evidence in 15 court? 16 A. As required, yes. 17 Q. What I actually want to do is to look, with your 18 assistance, at some of the practices and procedures 19 concerning fingerprints. 20 In your own statement, you mention membership of 21 committees and other organisations if I can just deal 22 with those, first of all, you mention a European Network 23 for Forensic Science. 24 Are you a member of that European Network? 25 A. Yes. The ENFSI (the European Network of Forensic page 3 1 Science Institutes) is actually an organisation for 2 directors of forensic science labs throughout the 3 European Union. In order to be a member, in effect, the 4 members are those directors. The institutes need to 5 meet certain criteria, for example, they have to have a 6 research and development programme. Within ENFSI there 7 are 16 specialist working groups, one of which is 8 dedicated to fingerprints and I'm currently the chair of 9 that working group. 10 Q. So far as the work of that organisation is it sponsored 11 by the European Union? 12 A. Recently in the last year, yes. It has become what the 13 European Union call a monopoly organisation, which means 14 that it the first port of call for the European Union 15 with regard to any forensic issues. There is some 16 funding now being provided by the European Union. 17 Q. I will come on in due course to the practices but at the 18 European level is there any work being done at present 19 in relation to standardisation of fingerprint 20 techniques? 21 A. The strategic plan of the working group does mention a 22 move towards what we've termed a universal standard for 23 fingerprint identification but at this moment in time 24 there is no ongoing work. 25 Q. Is there, if one looks across the membership, across the page 4 1 European Union, are there variations in practice in 2 relation to fingerprint identification? 3 A. There is. The majority of members have a numerical 4 standard so they set a numerical threshold generally 5 around 12 minutiae. The minority of members have 6 holistic or non-numeric practices, as we have in England 7 and Wales. 8 Q. Does the fact that the majority of the members have a 9 numerical standard around 12, is that itself a 10 dis-inhibitor to the search for some universal standard? 11 A. Perhaps inhibitor is the wrong word but, yes, at the end 12 of the day, they have a system that they believe works 13 successfully and, therefore, they are, needless to say, 14 not willing to move away from that necessarily. 15 Q. If I go across the Atlantic to America, we are aware of 16 a National Academy of Sciences report that came out at 17 the beginning of this year, I understand, through the 18 International Association for Identification, IAI, that 19 you are on a working party? 20 A. Yes. The Standardisation Committee, this is a new 21 committee but it's called the Standardisation Committee 22 2 because there was an initial committee way back in the 23 1970s. The aim of the Committee is really to address 24 two resolutions of the IAI. The first that states that 25 there is no scientific basis for a numerical threshold page 5 1 and the second, which is a resolution which prohibits 2 quality of reporting or probabilistic reporting by IAI 3 members. That Committee has finished its final meeting 4 and the report will be published in January. 5 Q. I don't want you to breach confidentiality in relation 6 to that organisation but we can understand then that the 7 two topics that are delayed now until January, I think 8 your statement has said the autumn but delayed now until 9 January, are firstly the question of whether there is an 10 empirical basis for a numerical standard; that's the 11 first? 12 A. That's correct, yes. 13 Q. Then, secondly, a topic that I will deal with towards 14 the end of my examination. It will also cover the 15 relevance of probability-based evidence? 16 A. Correct. 17 Q. Do I take it from what you have said the current 18 position of the IAI precludes a Fingerprint Examiner 19 giving any evidence based on a probability analysis? 20 A. That's correct. 21 Q. We will come to that a little later. 22 Before I get too far, one of the things in addition 23 to your statement that I have found useful in preparing 24 to ask you some questions is a chapter in a book and the 25 book is by Professor Fraser and is it Mr Williams? page 6 1 A. (Nodded) 2 Q. The Handbook of Forensic Science, a relatively recent 3 textbook, in which there is a chapter on fingerprints 4 which you co-author with Professor Champod? 5 A. That's correct. 6 Q. What is your working relationship with 7 Professor Champod? 8 A. I worked with Professor Champod at the Forensic Science 9 Service some ten years ago when he was one of the lead 10 scientists there and we have worked on a number of 11 projects since then. 12 Q. I will use this, as I've said, as a helpful guide 13 through some of the topics that I am looking at and I 14 will be conscious of the fact that I may sometimes be 15 reading things that are penned by you, sometimes reading 16 things penned by Professor Champod so if I am straying 17 into his area, then please just say because he will give 18 evidence next week. 19 Before I go too far, what I should pick up -- and it 20 is perhaps worth just putting on the overhead 21 projector -- is a section in the chapter that begins at 22 page 74 and actually mentions the McKie case so we just 23 actually want to see what you are on record as having 24 said about the McKie case. (Pause) 25 Page 74 is simply brought up to give the context. page 7 1 There's a section in the chapter relating to bias and 2 errors in fingerprint identification and it mentions the 3 work of, among others, Dr Dror to whom we have had 4 reference in the Inquiry. 5 In that context if I go to the next page, page 75, 6 we will see that you mention in the second paragraph on 7 the page the case of McNamee, again something we have 8 discussed in the Inquiry. You then mention the McKie 9 case, which I will come back to just in a second. 10 Finally, you mention the Brandon Mayfield case. 11 A. Yes. 12 Q. What I actually want to do is simply to bring to the 13 fore what is written about the McKie case. I am not 14 myself going to ask you anything about the McKie case, 15 but it is just as well to put on the record what you 16 have said in a paper that's co-authored with 17 Professor Champod. 18 You say: 19 "The second case is the supposed misattribution 20 (with allegedly 16 points in agreement) of a mark found 21 in a scene in Scotland to the thumbprint of Shirley 22 McKie. The McKie case is covered in a recent book 23 (McKie and Russell) and a full inquiry of the Scottish 24 Criminal Record Office and Scottish Fingerprint Service 25 has been undertaken by the Justice 1 Committee of the page 8 1 Scottish Parliament. In this case, there is not a 2 complete consensus. A minority of latent print 3 examiners continue to claim that McKie was indeed the 4 source of the disputed mark, whereas the majority have 5 declared an exclusion in this case. This lack of 6 consistency between examiners is a worrying fact." 7 So far as that is written it has not stated a 8 position one way or the other on the identification or 9 mis-identification of Y7. 10 A. That's correct, yes. 11 Q. So far as you yourself are concerned, have you actually 12 ever on any formal basis studied original material 13 relating to Y7? 14 A. No. I've seen no original material. 15 Q. You have, however, looked at material on the Internet? 16 A. Yes, indeed, yes. 17 Q. I don't myself wish to ask you your opinion about Y7 18 and, therefore, I will not take matters further than 19 that but it is just as well to know that you have at 20 least studied some material relating to Y7? 21 A. Yes. 22 Q. What I want to do is to look at practice and procedure 23 more generally and I will come ultimately to probability 24 analysis. Plainly I will be asking the practical 25 questions, primarily from the standpoint of your own page 9 1 organisation the FSS but if we stray beyond that to look 2 at practice more widely, then so be it but I am looking 3 primarily at the way that you practice and I will also 4 use the textbook as one of my lead sources in relation 5 to this. 6 If I begin then with a general understanding of the 7 methodology ACE-V, you and your organisation subscribe 8 to the ACE-V methodology? 9 A. We do indeed, yes. 10 Q. So far as the initial A, the analysis, is concerned, 11 what we are interested in understanding is whether there 12 is a practice, first of all, in relation to the mark of 13 beginning by an initial analysis of the mark and do I 14 understand that you would do that? 15 A. Yes. The initial action of the examination is to look 16 at the mark, the latent print, before the actual known 17 prints are seen and another word rather than analysis 18 phase is the information phase, which probably is a 19 little clearer, is to look at the image of that mark and 20 to record all of the observations that can be make. So 21 this is the number and type of minutiae, other features 22 that might be present. 23 Q. Plainly, as I proceed through this I will be discussing 24 each of these initials as a separate exercise. Perhaps 25 if we could put up page 68 of the article, it might page 10 1 provide a helpful basis for the discussion. You are 2 discussing ACE-V. What you say is: 3 "In general, most examiners subscribe to the ACE-V 4 methodology or a comparable protocol. ACE-V is an 5 acronym that stands for analysis, comparison, evaluation 6 and verification and implies four distinct stages to the 7 comparison between a mark and a print. In the UK 8 practice (and elsewhere), it is common to find little 9 distinction or clear-cut separation between its stages." 10 A. Yes, I think that's true. Although ACE-V is practised 11 by the majority of examiners, looking at case notes, 12 looking at the way in which they undertake their 13 examination, it's sometimes difficult to split it into 14 four separate stages. 15 Q. In particular, when I am looking at the analysis, I am 16 interested in the distinction between it and the 17 comparison phase. 18 As you practise, do you make a comprehensive 19 assessment of the mark before you carry out any 20 comparison? 21 A. I think there is a difference here between perhaps what 22 theoretically one would want to do and what one can do 23 pragmatically. Ideally you would make a comprehensive 24 assessment of that latent print and I think where the 25 mark is of poor quality that note-taking tends to be page 11 1 very extensive and the examination very extensive. 2 As the quality of the mark becomes better, then I 3 think some of the note-taking tends to be briefer. From 4 a pragmatic stance, particularly in my own organisation, 5 time is of essence so the current process that we use 6 for recording analysis is perhaps briefer than one would 7 want to see. 8 Q. So if we begin, I suppose, the way that I am primarily 9 interested in, which is practice. First of all, the FSS 10 is a commercial albeit a Government-owned and controlled 11 organisation? 12 A. That's correct. 13 Q. Do the commercial practicalities impact on the manner in 14 which you practise. 15 A. They do. We work -- obviously the amount of fingerprint 16 comparison work that we do within England and Wales is 17 quite small compared to the police agencies and so, 18 therefore, our customers are not looking for us to 19 perhaps provide or charge for more expensive note-taking 20 over and above those police agencies. 21 Q. Approaching it in stages, as you practise in practice, 22 if you are dealing with a mark that is of good quality 23 (and by that I mean it has a substantial number of 24 readily observable, discernible characteristics, any 25 number off the top of my head, minimum of 20, very clear page 12 1 observable characteristics), would you in practice 2 expect to take much in the way of any note at the 3 analysis stage? 4 A. Well, my expectation -- in a sense there would be a note 5 that that is the case. So in our current way of 6 recording this, the sort of minimum I expect to see is 7 some recognition of the general pattern, if that was 8 available, and some comment about the fact that there 9 are 20 readily visible minutiae within that mark and 10 that would be the extent of the note-taking. 11 Q. Assume a complex mark. Again, I suppose that requires 12 definition. Can I begin, before I infect things with my 13 misconceptions perhaps, how would you characterise or 14 define a complex mark? 15 A. Well, a complex mark, a difficult mark, would be one 16 where the minutiae in the features are not very distinct 17 within the image that you're inspecting, there is 18 clearly a lot of distortion, there might be overlays, a 19 number of factors that essentially distort the image 20 that you are trying to analyse. 21 Q. With a complex mark, can you explain in practice what 22 form of note-taking would you undertake if you are 23 analysing a complex mark? 24 A. Well, for complex marks the note-taking would be more 25 extensive. By definition it needs to be. So, again, we page 13 1 would be recording the general pattern, the number and 2 type of minutiae and other features that are seen but we 3 would need also to document any distortion, any 4 artefacts that were visible within that image and 5 ideally look for some mechanism by which that distortion 6 has taken place. 7 Q. Let us assume, for sake of argument, again, a number, 8 let us say there are 10 observable characteristics. 9 First of all, is that something you would regard as a 10 complex mark or a clear mark? 11 A. I would probably drop down a bit lower, perhaps around 12 six, seven or eight as being into the area of complex. 13 Q. That is fine, six, seven or eight. If you are in the 14 realms of six, seven or eight, would you in practice, 15 given the constraints you operate under, would you 16 actually list each of the six, seven or eight 17 characteristics and give a description, for example, 18 there is a possible ridge ending here, a possible 19 bifurcation there or do you simply note down that you 20 have observed in total possibly six, seven or eight 21 characteristics? 22 A. If it's a mark where there are that number of 23 characteristics and no great deal of distortion or 24 other, I'll use the term red flags, something in that 25 image that makes you concentrate more and wonder about page 14 1 how it was actually deposited, then the recording would 2 be, yes, there are six minutiae clearly visible on it 3 and that would be the result of it. 4 It really is driven by that particular mark. 5 Sometimes looking at the mark, even if you have clear 6 features, there will be something there that says I need 7 to look more closely, I need to analyse this more 8 closely, maybe the ridge flow is distorted or there is 9 some aspect of it that requires closer attention. 10 Q. So you may be more specific depending on how challenging 11 the mark actually is found to be? 12 A. Yes. The more challenging the mark, the more I would 13 expect to see the analysis increase in both time and 14 recording. 15 Q. Is this summary that you keep, the note you keep, is it 16 in narrative rather than visual form at this stage? 17 A. No, we -- the notes will be taken contemporaneously. We 18 have a form, although examiners can use plain paper or 19 type it out on a computer should they wish, but the 20 notes are taken contemporaneously and kept within the 21 case file. 22 Q. I am grateful that they are contemporaneous, for that 23 observation. What I meant is it someone simply 24 narrating, "I have seen, say, six features", in 25 narrative form rather than actually having a picture of page 15 1 the mark on which you would record where the features 2 were? 3 A. I'm sorry. Yes, it's narrative form. 4 Q. If I then take that up and -- well, first of all, can 5 there be a conclusion or an end to the process at the 6 analysis if insufficient characteristics are reserved? 7 A. Yes. Part of that process -- and the American's term 8 this sufficiency -- is to determine whether or not that 9 particular mark has any value within the examination. 10 So certainly at the analysis stage the decision could be 11 made that it's not comparable or that it's -- well, that 12 it's not comparable. 13 Q. We have also heard some evidence that there may be an 14 intermediate stage, a mark may not be comparable to this 15 extent, that it may not be capable of ultimate 16 identification to an individual but if the mark is 17 sufficiently important it could be compared against, for 18 example, the prime suspect to see if he could be 19 excluded. 20 A. Within the process that we use we determine whether the 21 mark is comparable and, therefore, that means it can be 22 compared against any set of known fingerprints that are 23 supplied. I don't think myself I can make a distinction 24 between it's excludable and it's identifiable. At that 25 stage of analysis what I am determining is can I compare page 16 1 that mark. 2 Q. So would there, therefore, be a relatively low threshold 3 for that or not? 4 A. Yes. By looking at the casework that we do, the vast 5 majority of marks go through to the comparison stage. 6 We actually discard very few at the analysis stage. 7 Q. First of all, to look at the scale, how many examiners 8 do you have, Fingerprint Examiners? 9 A. We currently have six Fingerprint Examiners. 10 Q. Can you give an indication of the sort of volume of work 11 that you deal with? 12 A. Yes. All examiners, in order to maintain competence, 13 have to deal with at least 12 cases in a year and most 14 examiners at the moment are dealing with somewhere 15 between 12 and 30 cases. 16 I should explain they work within different teams to 17 different customers and, therefore, to different 18 requirements and our examiners carry out the full 19 fingerprint process so we undertake the comparison but 20 we also undertake all the detection within the 21 laboratory as well. 22 Q. So, in fact, you will develop marks, for example, on an 23 exhibit and then carry out the comparison yourself? 24 A. That's correct. 25 Q. Would you, therefore, accept -- and this has been a page 17 1 suggestion -- that your company is not as fully engaged 2 in fingerprints as a police bureau, at least in terms of 3 volume of work? 4 A. In terms of volume, that's absolutely correct. We do a 5 very small volume of work compared to a police 6 Fingerprint Bureau. Absolutely correct. 7 Q. Do you see that as having any relevance to the 8 methodologies that you apply, the fact that you are a 9 small bureau whereas police bureaux are much larger? 10 A. Yes, I think it's fair to say it does because, 11 obviously, I've worked in a police fingerprint bureau. 12 I'm not under the same work loads and demands as a 13 fingerprint bureau. So note-taking, for example, there 14 is, in theory at least, more time for that to take 15 place. But then I do have those other constraints of 16 needing to meet very tight deadlines for customers and 17 needing to keep costs down, so, yes, different pressures 18 because I'm doing a slightly different job. 19 Q. However -- and this is where I'm interested just in your 20 background with various committees that you sit in and, 21 as you say, you have had a police background before this 22 company that you work for now -- so far as the benefits 23 of note-taking applied to the different environment of a 24 police bureau, a much larger bureau, do you commend 25 note-taking as a standard methodology? page 18 1 A. Yes, absolutely. I think that one of the key issues 2 around forensic science, and I think the NAS report 3 tries to make this clear, is this concept of 4 transparency, the ability to show to a court what you 5 have actually done and how you achieved the results that 6 you are presenting. Part of that is contemporaneous 7 note-taking and I think that is absolutely essential to 8 the scientific process. 9 Q. There has also been some discussion, and I just ask for 10 your comment on this, that contemporaneous note-taking 11 can actually be helpful to the reasoning processes of 12 the examiner. In other words, he has observed something 13 and then note-taking is a helpful check, can he actually 14 record it in a way that to him is persuasive. 15 Do you recognise that as a collateral benefit? 16 A. Yes, I do indeed. I think it is a very useful way of 17 articulating to yourself, for want of a better phrase, 18 what you have actually seen and what that actually 19 means. I think it's very easy to rely on subconscious 20 thought or as some people describe the black book 21 process which doesn't actually force you to really 22 explain what it is that you are seeing and what that 23 actually means. 24 Q. If I move from analysis into comparison -- before I do, 25 perhaps I should ask you something else and, please, page 19 1 feel free, if this is an area that's more 2 Professor Champod. Written in the analysis section we 3 can see in italics that the word "tolerances" is used. 4 "Analysis requires the examiner to examine a mark 5 without the print in order to assess and locate the 6 friction ridge skin features that may be used for 7 further comparison. The analysis also allows an 8 assessment of the quality of the mark and the factors 9 such as distortion, pressure, amount of residue and the 10 nature of the substrate and of detection technique used. 11 Taking these factors into account will help to set the 12 tolerances or boundaries that the examiner will have to 13 allow for considering a potential correspondence." 14 Can you explain what is meant by tolerances in that 15 context? 16 A. Yes, I think it's very much Professor Champod's word but 17 I believe what we are applying here is that you can, as 18 you were saying before, make some decisions about how 19 useful that particular mark is going to be, whether it's 20 identifiable, whether it's searchable at that analysis 21 stage. 22 Q. I will take you on then to comparison and, in 23 particular, what I am going to do is turn to page 69. 24 It is the second line of page 69. What is written is: 25 "The comparison should always entail observation of page 20 1 features in the mark followed by their location in the 2 print. The reverse process, from the print to the mark, 3 should only be made with care (and being documented)." 4 As I read that, first of all, what you are saying is 5 that, if I understand it, you can work in the reverse 6 manner, it is possible to do it but you must do it with 7 care? 8 A. Yes, it's certainly possible to do it. I think it's 9 allowable to do it but you do need to document that that 10 has taken place and be very clear in your own mind that 11 you are now seeing something in the mark that you didn't 12 see before because you have exemplar alongside it. 13 Q. First of all, I just wish to be clear as far as accepted 14 practice is concerned. We have heard ranges of opinion. 15 Perhaps the purest would be when you enter the 16 comparison stage you should only work with the 17 characteristics that you had noted at the initial 18 analysis stage. That's the purest. Then there are 19 ranges of view on the other side, perhaps the pragmatic 20 view, that there will sometimes be some event that 21 becomes more discernible in the light of the known print 22 so that you can go back to the latent in light of the 23 known and observe a characteristic not previously 24 observed and take that into account in the comparison. 25 Do I understand, therefore, in practice you will page 21 1 have occasion to work in the reverse manner? 2 A. Yes, in practice we do but with that stipulation that we 3 are very clear and we have document that that is what 4 we've done. 5 Q. Obviously, we have heard the danger here is some form of 6 unconscious/subconscious bias that someone is now, in 7 effect, perhaps at its crudest, seeing what he wants to 8 see in the crime scene mark. 9 Is that the bias that you are trying to protect 10 against? 11 A. Absolutely. I think it's a very easy route to follow, 12 to be influenced by the print and to start to see 13 features you didn't see before. To guard against that, 14 you need to work in that direction, between mark and 15 print. But from a practical standpoint, most examiners 16 I think would admit that if you do that then sometimes 17 you do miss genuine features. So it's a practical 18 application. 19 Q. I suppose it might be inferred that what you are saying 20 is that the protection that you have in place to guard 21 against the subconscious bias is, in fact, you do it 22 consciously because you are writing a note that you 23 have, in fact, done this in the reverse manner? 24 A. Absolutely and, as an example, if the majority of 25 corresponding features were found only after looking at page 22 1 the print, clearly that would indicate to me, another 2 one of those red flags, something is perhaps wrong and, 3 therefore, I'd be very cautious in terms of formulating 4 a finding on that comparison. 5 Q. The article proceeds to mention that: 6 "Instead of focussing on minutiae during the 7 comparison process, it is advised to compare every ridge 8 and furrow (assessing comparatively their length and 9 sequence) and then the shape of pores and edges if the 10 quality of the mark allows." 11 Is that set out as something that is more the ideal 12 than the way you would work in practice? 13 A. No, I think there are two methodologies really. The 14 more common methodology is to look for those minutiae 15 and associate the minutiae together in a configuration 16 by counting the ridges between them. The other 17 methodology is to, as it says, trace each ridge. So 18 even if there is not a minutiae there, look at the 19 ridge, look at the flow of that ridge. 20 That is quite common practice in the United States. 21 I wouldn't say the majority practice but common practice 22 in the United States and it does have some benefits. If 23 you apply that technique, which is one that I've 24 adopted, you find that, in some respects, you notice 25 more discrepancies than if you just merely centre on the page 23 1 minutiae points, the events. 2 Q. An alternative methodology we heard is that an examiner, 3 having carried out a comprehensive analysis of the mark, 4 will visualise a target group within the mark, an area 5 that has a prominent series of characteristics, and will 6 then start analysis of potential matches by looking for 7 a target group and then, if he finds the target group, 8 will then expand out going between the two. 9 Do you practice in that manner? 10 A. Yes, it's actually quite a logical -- you need a 11 starting point. In some respects you can put an S 12 between the A and the C, as a sort of search area 13 whereby you have your latent, you have some features in 14 that latent, you're looking for the known print which is 15 a potential match, and you are doing that by taking some 16 notable feature within the mark and looking for it in 17 the print and that's the process that you take. 18 Once you find that starting point, you can then 19 undertake the comparison by building out from that point 20 or, indeed, select another point and build out from that 21 point. 22 Q. If you are doing your examination in that manner, as you 23 say, with the intermediate S, the search, is that a 24 stage where you or is that a situation where you would 25 see note-taking as essential, given the risks of being page 24 1 influenced as you proceed from one back to the other? 2 A. Interesting, we probably wouldn't take any notes at that 3 point. Essentially, all we're doing there is taking 4 that target group and looking for it. What you should 5 remember, in most comparisons you have not got a mark 6 against one particular set of ten prints. You might 7 have several sets of ten prints so you're looking for 8 the particular finger or thumb which is going to match 9 within that group. That's the S type process. 10 Once you have found that potential, then you move 11 into the comparison stage and start, again, with 12 a starting point and then start tracing ridges and 13 moving out. 14 Q. So the note-taking would be done at the end of the 15 analysis phase. You might use an intermediate stage, a 16 search, to narrow down so that you then know the 17 particular marks you are going to look at more 18 carefully, but then you practice what you have mentioned 19 earlier, where you would do a more comprehensive 20 analysis of even the print, tracing ridges and the likes 21 because you feel that that gives more potential to see 22 differences as well as similarities? 23 A. Yes, that's correct. 24 Q. Also in the article you mention, at the second stage at 25 the end of the comparison stage, the benefits of page 25 1 documentation. There seems to be a hint here again, of 2 a practical slant to this because you: 3 "Documentation of this crucial stage is sometimes 4 sparse due to time constraints and it is not common 5 practice to produce any form of chart to record the 6 information." 7 Is that -- 8 A. In the comparison stage? 9 Q. Yes. 10 A. Yes, we do actually produce some documentation there. 11 If we exclude a mark, then actually we don't document 12 why we have excluded it. We merely state it's excluded 13 but if we make an identification, if we make some 14 association, then we will document why that association 15 has been made. That can be in narrative form but more 16 often is in the form of a digital image of the mark and 17 the print showing those features that actually 18 correspond. 19 Q. But you do accept that that is not, across the 20 fingerprint practising community, common practice? 21 A. It's not. Obviously, if we go back 20 or 30 years it 22 was common practice for each identification to be 23 charted and produced for court but as courts have not 24 required that, then that practice has ceased. 25 Q. The text does, however, gone on to say: page 26 1 "The absence of documentation may lead to 2 difficulties in disputed cases", and you say "we", that 3 is you and Professor Champod, "would advise systematic 4 documentation of the comparison stage." 5 So in a sense you have committed yourself to the 6 benefits of documentation at the comparison stage, 7 conscious that it could always come into a dispute in 8 court? 9 A. Yes, I think the guiding principle here is that in each 10 of these stages of this examination, as the forensic 11 scientist, what I am doing is recording my observations 12 on which I will base my findings. So if there's a 13 disputed identification at a later date I can go back to 14 contemporaneous notes and show how I formulated my 15 decision. 16 Q. Again, just to follow this through to give a 17 perspective, have you yourself had to give evidence in a 18 case that involved a disputed identification? 19 A. No, I haven't. 20 Q. Have you heard -- other than the examples that are 21 mentioned in the text -- have you heard of examples of 22 cases going to court with a dispute? 23 A. Being disputed in court? 24 Q. Yes. 25 A. Rarely, and not very many from the United Kingdom. page 27 1 Q. We will come on to some other features of that a little 2 bit later. 3 What I want to look at in the next context of 4 evaluation that has been carried out, I will break this 5 down and what I want to ask you about is a concept I 6 discussed with you yesterday about unexplained 7 differences. 8 As you have said, when you are carrying out your 9 comparison you are as attuned to differences between the 10 mark and the print as you are to similarities and we 11 understand that if a difference is observed it's not 12 necessarily fatal to a conclusion of match if some 13 persuasive reason is present for the difference. 14 Is that fair? 15 A. That's absolutely fair, yes. I think if there is a 16 discrepancy, if that can be explained or some 17 proposition put forward for why that discrepancy occurs, 18 then that's valid. 19 Q. Perhaps this is helpful, you would use the word 20 "discrepancy". If it has an explanation, a persuasive 21 explanation, then it is not regarded as a difference; is 22 that fair? 23 A. Yes, that's fair. 24 Q. But if there is no ready explanation for the discrepancy 25 are you beginning to look at it as a difference? page 28 1 A. Again, it's a warning signal. If you cannot see a 2 reason for it, then you need to be very cautious from 3 that point on. I think if you have one discrepancy and 4 you cannot find a persuasive argument for the one 5 discrepancy, how you proceed is probably based on the 6 other information that you can see. But if you have a 7 number of discrepancies and you cannot actually find 8 persuasive mechanisms for them, then really you are 9 moving towards exclusion. 10 Q. Can I take it from the answer that you have given that 11 you could, at least in theory at the moment -- we'll 12 come back to practice -- you could in theory contemplate 13 a situation where, with a discrepancy for which you have 14 no clear explanation, you might nonetheless conclude 15 that there's a match if there is a sufficiency of 16 similarities present. 17 A. I think that is absolutely possible, with the caveat 18 that in any report that is produced I would be saying 19 that there is this discrepancy so that it would be very 20 clear to courts and to others and to defence examiners 21 that I'm aware there's a discrepancy there but I can't 22 find a mechanism but because of the other information 23 I'm willing to provide a finding. 24 Q. Have you had experience of doing just exactly that, 25 reaching a conclusion in the presence of an unexplained page 29 1 discrepancy? 2 A. Actually, I don't recall that I have, no. I think this 3 is a very theoretical argument. 4 Q. That is why I am just interested in the theory, then 5 coming back to the practice. So though you can conceive 6 of this in theory, in practice you've never actually 7 done it? 8 A. Personally, no. 9 Q. Can you explain the difference really between the two? 10 Is there an in-built direction in which you would err, 11 so to speak? 12 A. I don't quite understand. In terms of ...? 13 Q. Without me putting words in your mouth, can you give us 14 an explanation why it would be that despite the 15 theoretical possibility that you might be able to 16 express a conclusion in the presence of an unexplained 17 discrepancy, that in fact you never have? 18 A. I've just never come across that. Yes, that sounds -- I 19 think in most cases where I have had discrepancies I 20 have been able to put forward a proposition for those 21 occurring. It's just the casework that I've seen. 22 Q. If I move beyond the question of evaluation now to 23 verification, I understand verification -- and your 24 article confirms this -- to be an essential, an 25 important part of the methodology. Is that fair? page 30 1 A. That's correct, yes. 2 Q. If I understand it correctly, standing back, the ACE 3 part is an individual assessment with a high subjective 4 content; would that be fair? 5 A. That's correct. 6 Q. The verification is, in effect, a quality assurance that 7 a different individual of competence and qualification 8 will himself reach the same conclusion, so it's a 9 cross-check? 10 A. Yes. I think it's fair to say verification has -- there 11 are a number of different schools of thought around 12 verification. We take the view that verification is 13 essentially a quality assurance, it's providing 14 assurance that the correct answer has been found by the 15 initial examiner. 16 There is another school of thought which tends to go 17 by the term of "blind checking", which is essentially a 18 re-examination. So its two independent examinations 19 arriving at the same result, both of which are aimed at 20 providing assurance. One is more labour intensive than 21 the other. 22 Q. Also we have heard some questions raised as between the 23 two schools that in a smaller organisation, obviously 24 yours is on the smaller end with six examiners, it may 25 be, frankly, impractical to expect entirely blind page 31 1 verification to proceed? 2 A. Yes. I mean, I've been party to the same discussions 3 and with ourselves, for example, blind verification 4 would be an issue, essentially it's going to raise costs 5 and we do have a limited number of staff. 6 I think there is, again, perhaps an academic 7 argument that if that's the right thing to do that's 8 what should be done and the resources should follow the 9 correct practice and not the other way round. 10 Q. Do you see, with all the imperfections as you said of 11 the cost constraints, do you see a necessity for 12 entirely blind verification or are you satisfied that in 13 the appropriate climate with individuals suitably 14 trained and acting with integrity, obviously, that blind 15 verification may be an unnecessary complication? 16 A. My personal view is blind verification is a step too 17 far. I think, as you say, with the correct training, in 18 the correct environment, assurance by an independent 19 check is purely sufficient. I don't see the need to 20 move to blind verification. 21 Q. In this context, you have obviously used the word 22 "independent", which is the key to this. The key is 23 what is meant by independence. In a blind verification 24 one can say there's a high degree of independence, the 25 Second Examiner does not know what his has preceded and page 32 1 is doing an entirely fresh analysis. In a sense, that 2 is the highest degree of independence. 3 Before we really debate what is the interpretation 4 you would apply to independence, if I come back into 5 your own work and I have an example that I will give, 6 again, if we were looking at a complex mark let's use 7 the range of six, seven or eight features that you have 8 mentioned is indicative of a complex mark for you. The 9 example I discussed with you yesterday is that a First 10 Examiner, let us say you, you have reached a conclusion 11 of a unique identification based on let us say the most 12 challenging number of six because you have found 13 something peculiar about that combination of six that to 14 your eye is indicative of uniqueness. Is that fair? 15 A. That's fair, yes. 16 Q. I am hypothetically the Second Examiner. I also see 17 those same six but I am just not myself seeing a 18 sufficient peculiarity in the six. So I am happy that 19 there are six characteristics there but I am not myself 20 tending to the view that it's unique. 21 Would it be, in practice, could there be a 22 discussion between the two of us to see if a consensus 23 could be arrived at? 24 A. Within the FSS, yes, that form of peer review discussion 25 takes place and we're quite happy with that. Again, page 33 1 a caveat is because we have well established examiners 2 with lots of experience, which makes me comfortable with 3 that process. But what we do is we do not have, for 4 want of a better word, a conference of all Fingerprint 5 Examiners discussing a particular comparison. So that 6 first and Second Examiner may have a discussion. They 7 may formulate a consensus opinion, again, which would be 8 documented, as will any of their findings or they may 9 still disagree, in which case it will go on to another 10 process through myself as the Lead Examiner to come to a 11 conclusion as to what we should report in that 12 particular case. 13 Q. Again, if I am looking in purely theoretical way at what 14 might be understood by the word "independence" in this 15 process, one might suggest that if the two examiners 16 have conferred, they have had a conversation that 17 has resulted in the second examiner (in this case me) 18 concluding that there is indeed something persuasively 19 distinctive about this combination of six so that I can 20 now sign off on an identification, it might be suggested 21 that that conversation having taken place has 22 compromised my independence. 23 Equally, the converse argument is that I am still an 24 examiner of skill and competence, ultimately the test 25 for me is my own integrity and professionalism and I page 34 1 know I'm responsible in court for that conclusion. The 2 independence really consists in my skill and integrity. 3 What view do you take on that? 4 A. I think the independence is the independence of the 5 examination, so if we take that scenario, the First 6 Examiner is independent in formulating their findings. 7 The Second Examiner has been independent in formulating 8 the findings. The discussion is after, if you like, 9 that process of independence so the Second Examiner 10 hasn't been influenced directly. The conversation is 11 taking place on the difference of findings as like a 12 separate stage. 13 Yes, it's fair. It's not a perfect system and in 14 the forming of the word "independence", it probably 15 isn't there but it is a practical, again, solution to 16 those issues. 17 Q. You have already anticipated by one of your questions, 18 the next stage and you do actually have a formal process 19 if there is a difference of view between two examiners 20 for the resolution of that, it comes to you as the 21 Senior Examiner to resolve the difference of view? 22 A. It does and, again, I take a very pragmatic view. The 23 first set of questions is what value is this particular 24 identification within the case. If it has no probative 25 value within that particular case then it's more an page 35 1 academic issue as to whether or not we have made a 2 match. 3 Then, obviously, I have full written reports of the 4 examiners who have looked at that before, and more often 5 than not what I will do is recruit in another examiner 6 who has had nothing to do with case to make some 7 judgments for me. 8 Q. Have you had experience, before we become too 9 theoretical, have you had experience of actually 10 reporting out as an identification through this 11 arbitration process something where there had been at an 12 earlier stage a difference of view amongst some of your 13 colleagues with one of them not yet persuaded that there 14 truly is an identification? Have you had experience of 15 reporting that out? 16 A. Again, no, but I think that's part and parcel of, as has 17 been pointed out, the low level of casework that we 18 have. Most of the thinking, as it were, and the way in 19 which I now carry out my role has developed whilst I 20 have been with the Forensic Science Service. It would 21 be interesting to apply those concepts in a busier 22 Fingerprint Bureau to see if they actually work. 23 Q. With that caveat, therefore, that you have not actually 24 done this in practice, if we can just take the benefit 25 of the thinking you have had in relation to the page 36 1 processes, could you conceive of a situation in which 2 the arbitration process would result in an 3 identification being reported, for example, to the 4 police despite a doubt in the mind of one of your 5 colleagues? 6 A. Again, from a theoretical point of view, yes, but I 7 think the point there is that the court, the police, 8 should be made well aware that there is this difference 9 of view between examiners. I think the underlying thing 10 there is that all the examinations have been competently 11 carried out but I have no issue in producing a report to 12 court that says, "Three examiners believe this is a 13 match, for these reasons ... and one examiner believes 14 it's not, for this reason ..." I think that's 15 fulfilling the role as a forensic scientist. 16 Q. The next part I want to do is just pick up something 17 that is in the text, moving to a separate part of the 18 evaluation. I have talked about unexplained 19 differences. I have gone through verification. I want 20 to come back now and look at the standards that are 21 being applied. 22 Your Article goes through, and I don't need to 23 rehearse the history with you of the 16-point standard. 24 It then comes to the practice within the UK of the 25 non-numeric approach and you have a formulation that's page 37 1 on this page, page 69, of the non-numeric standard that 2 I am interested in just looking at with you. It is the 3 penultimate paragraph on the page. At least to me the 4 text is a little blurred but we will do our best: 5 "In the absence of dissimilarities, the examiner 6 will weigh the corresponding features in reference to 7 the standards for identification. In a nutshell, the 8 individualisation will be reached when the examiner 9 observes a level agreement (across the three levels of 10 legible features) that exceeds the highest level of 11 correspondence he observed through his/her training and 12 experience in comparisons involving non-matching 13 entities." 14 Then it says: 15 "An identification is then concluded when the mark 16 shows sufficient ridge quality (clarity) of friction 17 ridges in agreement with the print so that the 18 probability for such a match to happen if a print from 19 another person is submitted is deemed to be impossible." 20 I am interested in that in two different ways. If I 21 go at it in the reverse way, as we will see later on in 22 the article you are, in fact, an advocate for the use in 23 fingerprint examination of probability material? 24 A. That's correct. 25 Q. Writing from that perspective -- and it's clear just to page 38 1 make that perspective -- what you are, in fact, saying 2 is that conventional fingerprint evidence has implicit 3 within it a probability analysis. It's simply that the 4 examiner has concluded from his observation that the 5 probability of a match is, in fact, so high that any 6 other individual presenting those same features is, in 7 fact, impossible? 8 A. Absolutely right. Conventional fingerprints is 9 probabilistic by basis, a form of subjective 10 probability. 11 Q. Albeit they might think the threshold is one of 12 100 per cent before they would express an opinion? 13 A. That's right. It's like a caveat being put over the top 14 of that that, yes, it's probabilistic but only when I 15 get into the very high likelihoods of the match am I 16 willing to report it. 17 Q. We will look at that a little bit later, in a moment. 18 What I want to do is reverse back to the preceding 19 sentence because that implies that an examiner would be 20 able to say to me, if asked, that perhaps through 21 working with an AFIS system that throws up potential 22 matches, an examiner would be able to say to me, 23 "Mr Moynihan, I have only ever, in all the AFIS 24 researches I have done, I have only ever have found two 25 individuals who happen to share five, six, seven page 39 1 characteristics", whatever it may be, "and, therefore, 2 the threshold I work to in practice is that highest 3 number. I have seen two individuals' prints who do not 4 match and let us say for sake of argument they had five 5 features in common so, therefore, my working rule is I 6 must have a minimum of five before I identify". 7 Is that as I should be reading that particular 8 sentence? 9 A. Yes. Essentially, what we are saying there is that each 10 individual examiner is formulating a personal threshold 11 based on their previous observations. It's more than 12 just the number of minutiae. It's about the 13 configurations of minutiae as well. Any particular 14 configuration of five minutiae that I have seen many, 15 many times before I would treat with less rigour in a 16 comparison than someone who has only seen that 17 configuration once before. 18 Q. In fact, before I ask you to comment on the evidence we 19 have had from others, do you yourself have a personal 20 threshold that you apply consistently across all 21 examinations or does your threshold vary? 22 A. I don't have a numerical threshold but undoubtedly, yes, 23 my examinations are based on my experience as a 24 fingerprint examiner. 25 Q. Can you tell me -- again, I know that you wouldnot be page 40 1 expressing your conclusion numerically but as you work 2 and you're checking for corresponding features, do you 3 have a minimum number at all that you would be working 4 to before you would express a conclusion of identity? 5 A. Not consciously, no. I wouldn't say that I set a 6 threshold at any particular number but again probably 7 subconsciously there is a number in my head somewhere 8 but consciously I would say I have no number. 9 Q. If it is in your head somewhere, it's not popping out 10 today, fair enough. 11 What this then comes back to is the answer you have 12 given is much the same as the other examiners who have 13 given evidence. We have not had any examiner who says, 14 "Yes, there is a minimum number I apply consistently", 15 that leads me to wonder whether the examiners are, in 16 fact, carrying out a more intuitive judgment because 17 they are not saying, "Mr Moynihan, I have seen two 18 individuals with five characteristics in common, 19 therefore, my minimum number is five", they are simply 20 saying depending on the particular configuration or 21 constellation of minutiae in a mark I will either see an 22 identity or not. 23 Is that fair, it is a more intuitive process? 24 A. I think that is fair comment. I think there's probably 25 a number of reasons why Fingerprint Examiners are loath page 41 1 to state a number and one of the reasons for that is we 2 know there is no number. We mostly accept that so I 3 think there's a nervousness to state a number even 4 though perhaps some Fingerprint Examiners are perhaps 5 consciously using a number. But, yes, as an intuitive 6 process that's correct. 7 Q. If I bring up pages 73 and 74 of the article, perhaps if 8 we could begin to page 73 and then move pretty sharply 9 on to page 74, page 73 -- if we just move the text up 10 because it is the last two paragraphs I am interested 11 in -- you observe, as you have told us earlier on when 12 talking about standards, that in continental Europe a 13 fair number of countries use a standard, 12 being quite 14 common, apparently Italy still being at 16 or 17? 15 A. Yes, that's correct. 16 Q. However, then you go on, along with Professor Champod, 17 at the foot of page 73 in fact, to argue, as you say, 18 from a logical perspective that there are reasons for 19 not insisting on a numerical standard? 20 A. Yes. 21 Q. So, therefore, if I am looking at the perspective from 22 which you are giving evidence, you are someone who is 23 persuaded there should be no numerical standard? 24 A. I am absolutely persuaded of that, yes. 25 Q. If we look then at page 74 and I will give you a page 42 1 chance -- and I must apologise, I hadn't forewarned you 2 I was going to use this article to the extent that I am 3 today -- if I give you a chance to read it, along with 4 others in the hall, the reasons you set out as 1, 2 and 5 3, and the question will be whether you are satisfied 6 that that gives your own reasoning for firmly advocating 7 the absence of a numerical standard. (Pause) 8 A. Yes. 9 Q. You are content with that? 10 A. Yes. 11 Q. As we say, in looking at -- and this is not intended in 12 any way to trap you -- what you have actually written is 13 that you can, in fact, if it is done appropriately, use 14 even as few as three minutiae and arrive at a reliable 15 conclusion. The question we will come to ultimately is 16 how you express that conclusion. 17 A. Yes, you can come to a reliable conclusion and, you're 18 absolutely right, how you express that conclusion is 19 perhaps the issue to discuss. 20 Q. If I look at this just now, what I am interested in is 21 moving through, before we come to probabilities, in 22 other words, how you advocate things are expressed, if I 23 take a step back and look at current practice. We have 24 had examiners give evidence and, indeed, even current 25 trainers give evidence that the training for Fingerprint page 43 1 Examiners is to express themselves only in terms of 2 100 per cent certainty. In the absence of 100 per cent 3 certainty, there will be no expression of opinion about 4 identity. 5 Do I understand you, from what you have said about 6 even IAI's current position where they do not permit 7 views of degrees of probability that you would accept 8 that that is the orthodox, in fact, universal practice 9 of Fingerprint Examiners? 10 A. Yes, it is the universal practice. I think particularly 11 with the IAI statement, for example, and I can't really 12 do this but it's necessary to look at the context in 13 which this was actually brought into force so it's not a 14 clear-cut rejection of probabilities as more a response 15 to events that were taking place in the early 1980s. I 16 think also there's a large sociological driver to this. 17 I think there is a perception amongst the fingerprint 18 community that the customers, the courts and police 19 forces require them to produce 100 per cent evidence 20 each time and that is what is driving the process. 21 Q. So there's a perception by the fingerprint community, as 22 you say, universally that the courts are expecting of 23 them only -- only -- 100 per cent certainty as to 24 identification and nothing else? 25 A. I believe that to be the case, yes. page 44 1 Q. Before we look at possible variants to all of this, from 2 a scientific perspective, what is your reaction to the 3 proposition that someone can be 100 per cent certain 4 based on the observation of minutiae in what is, after 5 all, a sometimes distorted, potentially partial 6 impression of a fingerprint? 7 A. I think from a purely scientific perspective, 8 identification or individualisation is not achievable, 9 certainly on a scientific basis, but I think within 10 again that pragmatic use of fingerprints what we are 11 doing is dismissing the likelihood that the source could 12 be another because it's so diminishingly small and, 13 secondly, as experts what we're giving is a personal 14 opinion that it can only have come from one particular 15 individual. Identification for me is my opinion rather 16 than something fundamentally founded on a scientific 17 principle. 18 Q. Because you will come ultimately, as we will see, to 19 advocate probability as a way forward, do you have from 20 the benefit of the work you have been doing any 21 misgivings about evidence being presented in court based 22 on 100 per cent certainty coupled with the absence of a 23 numerical threshold so that we have what I was 24 discussing earlier as an intuitive judgment being formed 25 by an examiner? page 45 1 A. I think it's fair to say, yes, I do have some small 2 misgivings. I think the current system does allow for 3 some overstating of the evidence. I can't produce 4 examples of this but I'm pretty confident that some 5 identifications, the actual configurations of the 6 minutiae, the basis on which that identification was 7 given is not as strong as the examiner believes it to 8 be. 9 Q. Indeed, if I look at what has been written by you, I go 10 back to page 72, page 72 is written: 11 "Fingerprint identification in the UK and around the 12 world is understood to mean that a mark has been 13 attributed to a particular individual to the exclusion 14 of all others, although it is seldom articulated in this 15 way. 'Others' refers often to any human in the world, 16 living or dead. In fact such a claim may be unnecessary 17 as in all but a few scenarios the suspect (or source) 18 may be from a much smaller or restricted population. It 19 is therefore interesting that examiners have felt the 20 need to make a much greater claim, presumably to 21 increase the perceived evidential value of the 22 identification." 23 A. Correct, yes. 24 Q. In fact, what I am interested in, as you write there, in 25 effect it is a two-edged sword. First of all, by the page 46 1 claim of 100 per cent certainty the examiner may be 2 overstating the reliability of his conclusion in one 3 particular case -- may be, not necessarily is. Correct? 4 A. Correct. 5 Q. Secondly, this is the other edge of the sword, by 6 addressing such a standard Fingerprint Examiners, the 7 community universally may be denying to the courts a 8 body of evidence? 9 A. I believe that to be the case, yes. 10 Q. If I pick up in relation to your own statement -- I 11 don't have the particular reference here -- do you have 12 experience of giving reports and, therefore, giving 13 evidence to the judicial system, where you are not 14 concluding a unique identity but you are in fact 15 offering a view that is, I might suggest, a consistency 16 between a mark and an individual but not to the degree 17 of individualisation? 18 A. Yes, in my career I have actually produced evidence on 19 two occasions, where on one particular occasion, the 20 examination had been inconclusive in terms of 21 associating the particular mark. I was asked to, if you 22 like, give a measure of how inconclusive that was and 23 that is what I did, based on my observations. So it 24 wasn't an identification but it was an attempt to 25 provide the court with some idea of how likely it was page 47 1 that that mark came from a particular individual. 2 Q. We have heard and we may hear some more evidence about 3 this next week that there is perhaps or there has been 4 evidence, starting in England, that looks at it perhaps 5 from a way that might be more comfortable for a 6 Fingerprint Examiner expressed in a way that he is 7 incapable of excluding an individual. 8 Is that a more relaxed way for a Fingerprint 9 Examiner to be looking at it? 10 A. I think that's nicely put. I think it's a very 11 comfortable way. If your career has developed with this 12 duality of identification/not identification to be able 13 to say, "I actually can't make a decision one way or the 14 other", is a comfortable option. 15 Q. So, in other words, by incapable of excluding what I 16 understand this to mean, and please correct me if I am 17 wrong, is the Fingerprint Examiner is saying the overall 18 pattern between the mark and the print is the same. 19 It's a whorl or a loop or whatever. Secondly, there is 20 a limited number of observable characteristics which 21 happen to be in common between the mark and the print. 22 There are no unexplained differences. So far so good? 23 A. Yes. 24 Q. But the examiner is saying the level of similarity is 25 not so high as to persuade me as to unique identity? page 48 1 A. Yes, in a sense, as I mentioned about personal 2 thresholds, it hasn't exceeded the personal threshold of 3 that examiner. 4 Q. Without the work you have been engaged in most recently 5 on probability analysis, how have you found yourself 6 able to express this intermediate position when giving 7 evidence in the past? 8 A. This has been purely subjective and reported as such. 9 What I have -- 10 (Interruption: car alarm) 11 Q. It has been more a subjective judgment that you have 12 expressed? 13 A. Yes. The one particular case that I'm thinking of, we 14 had only a particular number of individuals who were 15 known to be or for it to have been possible for those 16 individuals to have left the mark. So I had a 17 population with which to work to. So there were 18 immediately some judgments that could be made around 19 general pattern, for example. But it was intuitive and 20 it was very much based on my opinion as to how likely 21 that was to occur. 22 Q. I am grateful to you. What you have explained is it 23 really fits in with the text, if we put in an artificial 24 constraint and tell you it can only be a limited number 25 of individuals, the number of variables is, therefore, page 49 1 at least in theory, constrained by the population that 2 you are being asked to consider. Is that fair? 3 A. Yes. 4 Q. Therefore, working within this artificial constraint 5 that you are assuming it can only be one of a limited 6 number of individuals you, therefore, might need a lower 7 number of points in agreement to discriminate among that 8 population? 9 A. Yes. Professor Champod in an article actually made this 10 point, if you imagine hypothetical situations of cruise 11 ships in the middle of the Atlantic with a fixed number 12 of individuals then the number of correspondences you 13 would need between the mark on the murder weapon and a 14 particular individual will reduce because you can look 15 at the entire population. 16 Q. That, in a sense, explains and really introduces what 17 you are talking about with this, in fact, implicit 18 probability analysis that if you are looking at it from 19 an objective point of view, standing back, the scenario 20 that you are given can give you parameters for your 21 probability analysis so if the scenario is the murderer 22 must have been someone on that ship and you have 23 captured them all at a point in time then the 24 probabilities assist you in saying that you may need a 25 fewer number of variables to identify the culprit? page 50 1 A. In that particular hypothetical situation, yes, that's 2 right. 3 Q. The alternative example we have had, which is not 4 theoretical, it is practical, is identifying individuals 5 who have died in a plane crash by reference to 6 fingerprints. Again, it would be the same probability 7 scenario that is at play, there is a limited number of 8 potential individuals. You are simply discriminating 9 among them, you might need very few characteristics to 10 do that? 11 A. Absolutely. 12 Q. What I would like to do is just in looking at this in 13 your own statement, paragraph 53 you mention -- perhaps 14 I should bring it on screen FI0136. It is paragraph 53 15 which is at page 12, paragraph 53, page 12. 16 You are looking at likelihood ratios and I will come 17 to that after we are all fortified by some coffee to 18 assist but what you say is: 19 "However, the likelihood ratio for different 20 configurations of the same number of minutiae varies. 21 In other words, two different matching marks and prints 22 with the same number of corresponding minutiae may have 23 a different weight of evidence." 24 If -- and I do say if -- I understand this 25 correctly, what you are saying is simply to say that page 51 1 there are, let us say, eight points that correspond, 2 simply eight in the abstract, and I have two sets of 3 matching prints, each with eight points matching, you 4 are, in fact, saying from a statistical point of view, 5 one may in fact be more probable than the other, even 6 though they both have the same abstract number or 7 concrete number of matching features of eight? 8 A. Yes, because what we're talking about is a configuration 9 of a set number of minutiae so a particular 10 configuration of eight minutiae could be quite rare and 11 another configuration of eight minutiae could be very, 12 very common. So when measuring those probalistically, 13 statistically, you are going to get different weights of 14 evidence. 15 Q. Before we move into probability -- and this is the point 16 for concluding this particular section -- I discussed 17 with you this morning me, I think the discussion this 18 morning will help you to understand where I am coming 19 from. We have heard evidence that Fingerprint Officers, 20 Fingerprint Examiners, may think in terms of events. Is 21 that a term you are familiar with? 22 A. Yes. 23 Q. An event can cover something that is in the background 24 substrate, a pimple in wood or something of that sort, 25 or it could cover a ridge characteristic and if it's a page 52 1 ridge characteristic it could be a ridge ending or a 2 bifurcation. 3 Do you follow? 4 A. Yes, I do. 5 Q. Do you accept that? 6 A. Yes. 7 Q. We have heard some evidence that it may not matter to a 8 Fingerprint Examiner what the precise nature of the 9 event is, so long as he finds an event in the same 10 location in mark and print. 11 First of all, just thinking of this in terms of 12 conventional fingerprint evidence, what is your comment 13 on the proposition that the precise nature of the event 14 does not matter provided there is some event in the 15 corresponding location between mark and print? 16 A. No, I think whether it's a bifurcation or a ridge ending 17 is very important. I think if you considered two known 18 fingerprints with three bifurcations lying alongside 19 each other and you had another known fingerprint with 20 three clear ridge endings lying alongside each other, 21 they will be different. I don't think anyone would say 22 that they are matching events so the type of minutiae or 23 bifurcation is very significant. 24 Q. Let us just assume, for sake of argument, that the 25 precise discrimination in mark and print is doubtful, so page 53 1 that it is open to interpretation, and let us say an 2 examiner, conscious of this and he has reached perfectly 3 genuinely the conclusion of a match between the two so, 4 therefore, he is going to have to call the judgments the 5 same way in mark and print. Let us say he is doing it 6 perfectly genuine and you have use the example of three 7 so I will use that. He, therefore, has three events in 8 sequence in mark and print. He is going to call them 9 either three matching bifurcations or three matching 10 ridge endings and plainly in mark and print he must call 11 them both the same way. 12 At least in theory, starting in theory and then 13 we'll look at the practicalities, would there be a 14 difference from the studies that you are aware of be a 15 difference in the probability of a match if it's called 16 three matching ridge endings as opposed to calling it as 17 three matching bifurcations in a row? 18 A. It's interesting. We've not -- or personally, I haven't 19 actually carried out that experiment using our 20 mathematical model that but my opinion would be, yes, 21 potentially there could be. This is really the thing 22 with measuring the probabilities of a particular 23 configuration, it is possible they would have the same 24 weight of evidence but my expectation is it would be 25 different. page 54 1 Q. Why would you have that expectation? I appreciate you 2 have not been asked to carry out the experiment. 3 A. I am just basing that on my experience so, therefore, it 4 might not be the strongest piece of evidence I can put 5 forward but my experience tells me that that probably 6 would be the case but until the work is done it's 7 difficult to be precise. 8 MR MOYNIHAN: I think we may well benefit by being fortified 9 by caffeine before we move to the next stage, which is 10 probability analysis. 11 THE CHAIRMAN: Just while I remember to ask you is there any 12 possibility that the characteristics, the same 13 characteristics, might appear nearer the core than would 14 further out, if you see what I mean, the similarities 15 might appear? 16 A. There are -- yes, there are some research papers that 17 look at the distribution of different characteristic 18 types within different areas. So you do get a higher 19 likelihood for some bifurcations in some areas rather 20 than others. The simple answer is probably. One thing 21 with the model we have it doesn't make any assumptions 22 of that type. 23 THE CHAIRMAN: I was just wondering whether not only the 24 rarity of the characteristic but the place where it is 25 found in the print has a bearing on it? page 55 1 A. Yes, as I say, there's limited research around the area 2 but I'm sure that is the case, certainly in terms of if 3 you look at the delta-type formations you have more 4 characteristics around the delta formation than in other 5 parts of the print. So the type, I am sure, probably is 6 relevant to those areas as well. 7 THE CHAIRMAN: What we normally do is take a short break now 8 and we will sit again at 11.25. 9 (11.04 am) 10 (A short break) 11 (11.28 am) 12 MR MOYNIHAN: Mr Chamberlain, if I just reverse back into 13 some of the questions we were talking about earlier just 14 to cover some more of the detail. I will ask you 15 something about verification in a moment and what you 16 are currently working on. 17 If I step back to the beginning, we have talked 18 about the volume of work that you are doing and how your 19 practices may relate to the volume of work. I don't 20 want to breach commercial confidentialities but the type 21 of agencies that you work for, do you do work for police 22 forces? 23 A. Yes, we do, for police forces, some Government 24 investigative agencies. 25 Q. Any other agencies? page 56 1 A. No, I think that covers ... 2 Q. Do you ever get involved in defence work; in other 3 words, are you ever approached by solicitors acting for 4 accused persons? 5 A. It has occurred in the past very rarely. Most of our 6 work in defence comes through the IPCC(sic), the 7 Independent Police Complaints Authority, and a couple of 8 other review commissions but direct from defence, 9 rarely. 10 Q. So in other words, you are essentially servicing the 11 public sector? 12 A. Essentially, yes. 13 Q. The second thing is I had asked you about note-taking 14 and I am quite conscious that perhaps I may be looking 15 at note-taking practices today. 16 We are looking at events in 1997 (in other words, 17 more than ten years ago). When you were working for 18 police forces was there a practice then of taking notes? 19 A. No, there wasn't. 20 Q. Even today, would you regard your own practices as being 21 the exception rather than the rule for authorities in 22 England? 23 A. Within England and Wales, from my knowledge, yes, I 24 believe we are the exception. 25 Q. However, you are also the exception in that you are the page 57 1 one fingerprint agency that is accredited to ISO17025? 2 A. That's correct, yes. 3 Q. It least it is your perception that note-taking was an 4 essential feature of complying with that standard? 5 A. Yes, as an auditor for 17025 I don't think you can meet 6 the standard unless you are making contemporaneous 7 notes. 8 Q. The final point that I said I would reverse back into is 9 verification. We had some discussion about the 10 processes that you currently apply and, in particular, 11 what independence means. 12 I understand from you that you are actually carrying 13 out work within your organisation in at least 14 considering the potential for a greater degree of 15 independence? 16 A. Yes. We're looking at a technological solution to this, 17 a computer-based comparison system. It will actually do 18 two things. First, in the analysis phase it will not 19 allow the examiner to see the known print until the 20 analysis has been completed and the note-taking will 21 become an audit trail of the actions undertaken on the 22 computer. 23 Secondly, in terms of verification, once you have 24 made a match or you need a verification and you push the 25 button, the computer will decide where that verification page 58 1 is taking place and, at least in theory, that 2 verification could take place in an entirely different 3 agency or part of the world. It doesn't have to be 4 someone within your own department. 5 Q. If it is within your own department, would you still 6 envisage, because you are a small community, that one 7 examiner would almost inevitably know that somebody else 8 has been involved before him, even with a computer-based 9 system? 10 A. Yes. If it was restricted within that department, yes, 11 clearly. 12 Q. The technology you are talking about, is that still very 13 much under development? 14 A. Yes, there are a number of technical issues to solve so 15 it's still very much in development. I wouldn't imagine 16 it will be available for a couple of years. 17 Q. What I want to do before we move on to probability is 18 looking at the conclusion in relation to current 19 fingerprint practice. In the article, if I go back to 20 the article, it is at page 78 it begins and then I will 21 quickly move from page 78 to page 80, at page 78 you 22 begin with the context and you are looking at 23 fingerprint evidence in court and you're looking at a 24 number of unreported cases in relation to this. That is 25 the context. page 59 1 If I then turn you, please, without diminishing the 2 conversation that has taken place preceding this, turn 3 to page 80 you might write in the second full paragraph 4 on the page -- probably, I should start on page 79 at 5 the foot. You are mentioning some American case law. 6 It is page 79, four lines up from the foot you say: 7 "Later in Mitchell the Court of Appeals for the 8 third circuit, the Appeal Court gave, while accepting 9 fingerprint evidence under Daubert, a fair assessment of 10 the field: on balance the probative benefits outweigh 11 the risks, but the field lacks clear standards and the 12 debate is marred by the ill-defined concept of the 13 criteria for sufficiency." 14 A. That's correct. 15 Q. If I understand what you mean by "the debate being 16 marred by an ill-defined concept of the criteria for 17 sufficiency", is that going back to the conversation I 18 had with you earlier about the intuitive judgment about 19 whether there is, on a non-numerical basis, sufficient 20 observed characteristics consistent with a unique 21 identity? 22 A. Absolutely right, it's back to that issue of personal 23 standards, personal thresholds. 24 Q. You then go on and say: 25 "The scientific status of identification evidence page 60 1 and in particular fingerprint evidence still receives 2 critical attention from scholars and commentators." 3 You mention a number. 4 "Simon Cole in particular published a series of 5 papers pointing out some critical weaknesses in latent 6 fingerprint identification", and you refer to his series 7 of articles. 8 I then turn to what I wanted to ask you about with 9 that background: 10 "The present situation is that the UK courts accept 11 the non-numerical standards and for the most part do not 12 challenge the identification." 13 So if I just stop there, that is your personal 14 experience, is that fingerprint evidence remains largely 15 undisputed in the judicial process? 16 A. That is certainly my experience. 17 Q. You say: 18 "The reasons for this may be twofold. First, the 19 general perception among the public (including 20 judiciary) is that fingerprint evidence is irrefutable 21 and safe." 22 A. Yes, very much so. 23 Q. Then: 24 "This view is consistently reinforced by the media." 25 A. Yes, I think you can again take a rather simplistic page 61 1 example, if you look at the TV programme CSI, 2 fingerprint comparison there is carried out by a 3 computer and hardly plays a part in the process at all. 4 It's accepted that it's scientifically sound and there 5 is no variance in the decisions. 6 Q. I suppose CSI has actually made your discipline much 7 more attractive, so I understand. 8 A. Apparently so, yes. 9 Q. Then you say: 10 "Second, there may be a lack of adequate defence 11 expertise. The defence, therefore, tend to try to 12 devalue the evidence through claims to legitimate 13 access, attacks on the chain of evidence or occasionally 14 discrediting the examiner." 15 So, in effect, collateral challenges to fingerprint 16 evidence. 17 A. Yes, I think in the past talking to barristers there was 18 very much a view that the identification could not be 19 attacked, that it would always be essentially correct 20 and, therefore, the only areas to attack were the 21 examiner themselves and the chain of custody. 22 Q. Then you go on to say: 23 "In fact, there are a number of other lines of 24 questioning that may be appropriate (especially in the 25 aftermath of the Mayfield case): for example, the lack page 62 1 of a demonstrable process, issues relating to ongoing 2 competence of the examiner and lack of contemporaneous 3 notes and detailed records of the conclusion and its 4 basis." 5 A. Yes and, again, that's very much looking at the American 6 justice system at the moment, where they are making and 7 have done for the last 10 to 15 years, numbers of 8 attacks, for example, specifically around the existence 9 of notes taken at the time of the comparison have been 10 issues raised in open court for debate. 11 Q. Again, those may be regarded as process or collateral 12 issues. On the basis of the work that you have been 13 doing, the thinking you have been doing over the years 14 that feed into this paper, do you believe that in 15 particular with a non-numerical standard that there 16 ought to be scope, in fact, if there were defence 17 expertise for a head-to-head dispute in relation to the 18 conclusion of fingerprint evidence rather than just 19 collateral process issues? 20 A. I think there's certainly scope for them. Some of what 21 we discussed before about the issue of events versus 22 actually saying it's a bifurcation/ridge ending I 23 believe does give scope for challenging an 24 identification. 25 Q. So, in other words, there would be scope, if I use a page 63 1 perhaps more technical expression, there would be scope 2 for dispute in relation to the interpretation of 3 particular events perhaps -- perhaps -- giving rise to a 4 dispute as to the conclusion reached? 5 A. Yes, I think that's exactly right. 6 Q. For the reasons that you have canvassed in that 7 paragraph, it just simply doesn't occur today? 8 A. Correct. 9 Q. You then go on to look at the manner in which matters 10 are presented in court. When you were looking at how it 11 was presented in court are you primarily writing, or 12 with Professor Champod, your own experience of matters 13 in England? 14 A. Yes, that's correct. 15 Q. Do you have any personal experience of practice in 16 Scotland? 17 A. None in Scotland, no. I do have some knowledge of 18 practices in the United States and some other countries 19 but strangely enough not Scotland. 20 Q. It is just so that when we are reading this you are 21 tending to think of those jurisdictions and not ours. 22 Nonetheless we will speak of it from its parallels. You 23 say: 24 "Examiners supply statements in accordance with the 25 prevailing rules. However, in general, these statements page 64 1 do little more than offer the opinion of the examiner 2 and provide rather limited detail on how the conclusion 3 has been drawn." 4 So if I tell you I understand Scottish practice both 5 in 1997 and today is to present a very, very brief 6 report consisting of not much more than the conclusion 7 of the examiner, that would in fact be consistent with 8 the jurisdictions that you are familiar with? 9 A. With my experience of them, yes. 10 Q. What you then go on to say is: 11 "The practice of charting the mark and print to 12 demonstrate the features in agreement is no longer 13 common ..." 14 That is your experience of other jurisdictions? 15 A. Yes, it is. Even in the United States where that was, 16 up until very recently, a very common practice it seems 17 to have fallen into disuse. Certainly in the United 18 Kingdom I don't know personally of anyone who has 19 charted a mark for a long period of time. 20 Q. In fact, that, if I tell you, seems to be the experience 21 in Scotland and this week we also had Mr Logan from 22 Northern Ireland and that seems to be his experience as 23 well. 24 You then say though, and this is the conclusion of 25 this that is written by you and Professor Champod: page 65 1 "... thus the transparency of the examination 2 process may be questioned." 3 Do you have difficulties about the transparency if 4 there is no note-taking and no charting being produced 5 in court? 6 A. Well, I think this stems from perhaps 7 Professor Champod's and my view that as forensic 8 scientists we should be providing all the information to 9 the court, so showing transparently exactly what we have 10 done, how we have arrived at our decision. Note-taking 11 is part of that but if we refer to the statements, 12 statements from the FSS, for example, provide perhaps 13 not the most robust but at least some information about 14 how we arrived at our decision rather than just the 15 decision itself. 16 Q. That leads naturally to the question, we have talked 17 about note-taking and about the degree to which you 18 would note specific characteristics and you said at the 19 end of the comparison stage you would tend to capture 20 images of mark and print with the features of 21 correspondence highlighted in some way. 22 A. That's absolutely right, yes. 23 Q. In the reports that FSS produces for the various 24 agencies that it works for, will there be a definitive 25 description given of the characteristics that are page 66 1 observed in mark and print that are in sequence and 2 agreement? 3 A. At the present moment in time, no we don't. We provide, 4 as I say, this explanation of the process. We declare 5 the existence of what we call these feature maps but we 6 do not provide much more than the conclusion at the end 7 of the statement. 8 Again, unfortunately, that is rather driven by 9 customer requirement rather than by necessarily my view 10 of how we should be producing that. 11 Q. When you say customer requirement, your customers it 12 would sound are more interested in your conclusions than 13 in the reasoning that's preceded that? 14 A. I think that's absolutely correct, yes. 15 Q. Then you say: 16 "There is a common practice within the fingerprint 17 community to document factually what has been done 18 without documenting why a given conclusion has been 19 drawn." 20 A. Yes that's right. It tends to be lots of documentation 21 around chain of evidence, for example, and techniques 22 that have been used in detection but less documentation 23 supporting the formulation of the findings. 24 Q. Again, inhabiting the practical world you do and you 25 have described, you would accept that even your own page 67 1 practices may not match up to what one might take out of 2 some of the features of this article or chapter as the 3 ideal? 4 A. Absolutely. We are a way from perhaps the standard that 5 I'm writing about there. 6 Q. Just stopping there, before we go on to look now next at 7 probability, are there key features of even what you 8 practise that you regard as matters that should be given 9 more careful consideration, from the consumer 10 perspective? 11 A. Yes, it's difficult but I think the fundamental process 12 that I'm involved in in providing evidence or 13 intelligence to my customers is based on the findings 14 that I record. So I would like my customers perhaps to 15 be more interested and more supportive of the need for 16 me to document what I do, absolutely. 17 Q. We will look at the future, which looks perhaps at the 18 more headline areas and doesn't look at documentation. 19 You look in the first paragraph at developments in 20 technologies to recover fingerprints. We need not take 21 up time with that. You are also expecting AFIS 22 technology to continue to improve and then the point 23 that I did want to discuss with you was the final 24 paragraph on page 80. You say: 25 "... probably the most important development will be page 68 1 the design of statistical models to evaluate low 2 features matches." 3 A. (Nodded) 4 Q. That takes us into the realm of probabilities? 5 A. It does indeed. 6 Q. Before we get too far into the realms of probabilities, 7 first of all, if the dispute in a particular case 8 relates to what we have just discussed previously, 9 namely, the interpretation of particular characteristics 10 as a ridge ending or a bifurcation, that is one; 11 secondly, the presence of coincident characteristics, in 12 other words, whether there were 16 points in sequence 13 and agreement or relatively fewer than that; probability 14 analysis is irrelevant to that? 15 A. Yes. If the issue is whether or not there is a 16 corresponding configuration for whatever reason then 17 probabilistic analysis is not going to assist in making 18 that decision. 19 Q. Then looking at probabilistics and probability analysis 20 do I therefore take it you begin with a conventional 21 fingerprint analysis of mark and print to form a 22 conclusion about the presence in both of a number of 23 points that are in agreement? 24 A. Yes. The ACE-V process remains identical to as it is 25 today. It doesn't change that process at all. page 69 1 Essentially, what we're doing is once a corresponding 2 configuration of minutiae is found is providing a 3 mathematical measure of the weight of that evidence as 4 an additional piece of information that's used in the 5 evaluation stage. 6 Q. As I have said, perhaps it helps because your article is 7 speaking of statistical models to evaluate low features 8 matches. Are you envisaging that probability analysis 9 would be used in every case or only in cases where there 10 are relatively few minutiae? 11 A. I guess within those people in the community talking 12 about this that is the debate, whether you use 13 probabilities across all matches or just low feature 14 matches. 15 What our research and other research has shown is 16 that when you get in excess of 12 minutiae likelihood 17 ratios become very large numbers which appears to 18 indicate that genuine configurations of 12 minutiae plus 19 are quite safe and very specific. So, therefore, at the 20 moment my view is that these models are aimed at those 21 low features, between 3 and 12. 22 Q. In what you have said you have used, to some extent, 23 a vague, if you will forgive me for saying, quite safe, 24 reasonably specific, you are not claiming from a 25 scientific point of view using the word "claim" page 70 1 appropriately. The proposition is not there is 2 100 per cent certainty above that level, it's just that 3 there is a relative degree of security in the findings? 4 A. Yes, the words are chosen carefully. It's this concept 5 of difficulty with individualisation as provable, which 6 it's not so probabilistic models will indicate there's a 7 very slight chance that it could come from some other 8 individual but they will not support an 9 individualisation or identification. 10 Q. So they will not support a unique identification but 11 they will show -- and you have said experience is from 12 12 points and upwards, there is a low chance of a 13 coincident observation of these features in two 14 different individuals? 15 A. One way of putting it is to say the likelihood of that 16 mark coming from a different individual is so 17 diminishingly small that I can reasonably dismiss that 18 as a proposition. 19 Q. Therefore, I take it from that that, as you say, the 20 balance of the debate tends to be whether probabilistics 21 or probability analysis is a useful tool in the criminal 22 justice system when one is encountering lower levels 23 than 12? 24 A. That's I think where the debate should be had, yes. 25 Q. Again, based on what we discussed before the break, do I page 71 1 take it that part of the thinking that underpins this, 2 the example I used earlier was eight characteristics, 3 you might have eight genuinely identical characteristics 4 in two different sets of matching pairs and your studies 5 would suggest that the likelihood ratios associated with 6 those matching pairs can be different. 7 A. Correct. 8 Q. So the likelihood is not a feature of the number of the 9 number of characteristics that are common, it's rather 10 peculiar to the precise configuration? 11 A. That's correct, yes. 12 Q. If I understand, equally, what you have written in the 13 article, by looking at low frequency of minutiae you are 14 looking contemplating going very low down, down as far 15 as, for example, three minutiae might be discriminating 16 to an acceptable level for the criminal justice system? 17 A. Yes, from a mathematical statistical point of view we 18 can generate likelihood ratios on three minutiae which 19 appear to be useful evidence or intelligence for the 20 court process. I think it's worth saying that, to a 21 certain extent, the acceptability of that within the 22 criminal justice system is something that will be 23 decided in the fullness of time. 24 Q. So, in other words, the whole model is one that remains 25 under examination rather than having been verified and page 72 1 accredited? 2 A. The current situation is we're approaching the end of 3 its scientific validation. The next stage will be to 4 move to acceptance into judicial systems. That's not 5 necessarily an easy process to go through. 6 Q. If I can then just look at it with those qualifications 7 in mind, first of all, it is based on a statistical 8 model; is that correct? 9 A. That's correct, yes. 10 Q. It is a computer system based on a statistical model. I 11 understand that the author of the statistical model is 12 Professor Champod? 13 A. This particular model in the FSS is actually Dr Cedric 14 Neumann who worked with Professor Champod. 15 Professor Champod provided a lot of the early momentum 16 to this project when he was an employee of the FSS. 17 Q. So if I wanted to ask about the detail of the statistics 18 Professor Champod would be the better person? 19 A. Absolutely. He would be the person to ask, yes. 20 Q. With that qualification I will be relatively superficial 21 in my conversation with you. 22 Is the statistical base something different from the 23 national fingerprint register or catalogue? 24 A. Yes. The model works on a database which is essentially 25 of minutiae configurations and generates a statistic page 73 1 based on that database. So it's not attempting to say 2 how likely a particular configuration is within the 3 national database, it is providing a pure statistical 4 measure of the likelihood of that 5 configuration appearing. 6 Q. Do you use a particular restrictive population for your 7 database? 8 A. Yes, the database at the moment is based on 9 configurations which have been extracted from the 10 fingerprints of Swiss prisoners. 11 Q. Therefore, do you recognise at least the possibility of 12 limitations in that? 13 A. It's one of the interesting things. We would, at the 14 moment, say fingerprints are the same regardless of race 15 and nationality but undoubtedly at some point in the 16 future someone is now going to test that assumption. 17 Q. So far as, again, the work that we would understand that 18 you are having to undertake, is the statistical 19 reliability of the database something that's having to 20 be considered? 21 A. Indeed it is and publications will be produced that show 22 the theoretical basis for why that is a suitable 23 database to use. 24 Q. Again, because of the commercial application we'll not 25 go too far in relation to that. page 74 1 So it's based on a data population of fingerprints; 2 do I understand? 3 A. Yes. 4 Q. What it is trying to do, is it, to answer the Chairman's 5 question, it is trying to look across a database of the 6 prevalence of particular combinations, for example, in 7 proximity to the core or the delta. That's the type of 8 thing it is trying to do? 9 A. Absolutely, yes. 10 Q. It results in something called a likelihood ratio and I 11 understand what that is trying to do is to tell me what 12 the chances that a print, for example, is mine compared 13 with the chance that it might be the print of somebody 14 else completely unrelated to me? 15 A. Yes. As with all these things, it's very easy to slip 16 into transposing conditionals and saying things which, 17 strictly speaking, are incorrect but the easiest way to 18 think about it is it's a measure of the weight of 19 evidence, the likelihood that that particular mark came 20 from a particular individual is a very simplistic way of 21 looking at it. 22 Q. Is the object then in looking in particular at 23 relatively low minutiae, for example three, to enable a 24 Fingerprint Officer ultimately, if this is all tested, 25 to be able to answer the type of question I was posing page 75 1 to you earlier, namely, it is not a claim this is 2 indicative of a unique match but is nonetheless 3 expressing the chance, in completely lay terms, that 4 that fingerprint may indeed have been left by the 5 suspect or an incriminee or someone of that sort? 6 A. Yes. We see it as a tool for even the higher numbers of 7 minutiae to assist the examiner but, essentially, it 8 does open up that possibility of taking marks with very 9 low numbers of minutiae, three minutiae, and providing 10 some evidence, intelligence, some information to a 11 court. So, yes, one of the -- it's not a driver for the 12 project but one of the benefits of the project could be 13 that there are more marks out there which can be used 14 within the judicial process. 15 Q. Because it is helpful to express it in that way, what is 16 the driver for the project? 17 A. Well, the project actually established with 18 Professor Champod before we were a commercial 19 organisation and was, essentially, an academic 20 experiment to look at configurations of minutiae and how 21 specific they were. It's now developed into an attempt 22 to provide an objective tool that can be used by 23 Fingerprint Examiners. 24 I should add that at the moment we're very -- this 25 is very much first generation. We're only looking at page 76 1 bifurcations and ridge endings and no other feature sets 2 so models of this type will develop over time to become, 3 probably, a fundamental tool in the arsenal of 4 Fingerprint Examiners. 5 Q. Do you see that as a tool that would be used in every 6 case or do you, for the reasons we have discussed, see 7 it as being essentially one where we are looking at 8 below 12 characteristics? 9 A. I think this particular tool, and probably for the 10 foreseeable future, we're looking at below 12 11 characteristics but as the feature sets are added and 12 the tools mature it's possible they will become used 13 right across fingerprint comparison. 14 Q. I started with the proposition that the probability 15 analysis won't assist if the dispute is a dispute among 16 practitioners about the observable characteristics, it 17 simply converts what the examiner records as having seen 18 into a number of likelihood. 19 A. Yes. 20 Q. So far as that is concerned then, as you envisage 21 operating the system, how would you expect the examiner 22 to be inputting the data? Would he be looking simply at 23 confirmed characteristics or would he be looking at 24 debatable characteristics as well? 25 A. I think initially the process would be to look at those page 77 1 characteristics in which they have a high confidence, 2 those confirmed characteristics, to measure a likelihood 3 ratio around those. 4 If there were characteristics of less confidence 5 then to add those in in subsequent runs of the 6 likelihood ratio is a logical thing to do. It's 7 possible that one of those less clear characteristics 8 will not affect the likelihood ratio of the ones that 9 have already run or it could turn out to be very 10 significant and that is part of that comparative process 11 to establish what could be used to base the findings. 12 Q. So, in other words, you could envisage two ranges of 13 likelihood: one on the more certain characteristics; one 14 on the more debatable or including the more debatable 15 characteristics? 16 A. I think it's quite possible in any examination you would 17 generate several different likelihood ratios and several 18 different sets of minutiae and then the evaluation stage 19 would be to look at those and to base your findings on 20 what you thought that was telling you. 21 Q. Something that we may hear a little bit more about next 22 week, the danger in all of this, in particular, as you 23 say, because of the intuitive feel that from 12 24 characteristics and above the likelihood of a match is 25 high, is that a probability analysis might give a page 78 1 misleading impression of the reliability of the work 2 because, for example, someone who is observing a high 3 incidence of points of similarity may inappropriately 4 discount a difference and the probability analysis will 5 not reflect that. Is that fair? 6 A. That is fair and I think we are back round to this issue 7 of transparency and to the judicial process actually 8 challenging those decisions. Certainly, I would 9 envisage that reporting a likelihood ratio 10 probabilistically is going to include probably some 11 charts and certainly far more detail about what has 12 actually been done in order that that may be challenged. 13 Q. In a sense, the very fact that it's being presented with 14 a degree of mathematical precision means that it is all 15 the more necessary for the assumptions that have been 16 made to be clearly stated and to be capable of being 17 audited? 18 A. That's correct, yes. The production system that we 19 would envisage would audit trail every input that's put 20 into a particular mark so there would be clear 21 demonstration of what the examiner has done, how they 22 have placed particular minutiae, how they may have moved 23 the placement of particular minutiae and how that's 24 affected the likelihood ratio. 25 Q. Because this involves you working, as you say, not the page 79 1 driver to begin but what is seen as a collateral benefit 2 can involve you working with low minutiae fingerprints, 3 is it envisaged that this will result in scenes of 4 crimes officer, in fact, detecting and ingathering a 5 greater volume of marks from crime scenes? 6 A. We certainly saw that as a possibility. There is some 7 work being undertaken at the moment to try and establish 8 whether that is the case and try to quantify how many 9 additional marks there are out there to be captured. I 10 think logically I know that there are but quite what 11 that impact will be is difficult to assess at this time. 12 Q. As you say, because as a scientist you work both on the 13 disclosure of the marks and their identification, you 14 are in a position to say from personal experience to 15 what extent additional volumes of mark may, in fact, be 16 disclosable or do you yourself find this is something 17 that just needs further research? 18 A. I think it might be difficult to base it on my -- from 19 my own experience are there additional marks to recover? 20 Yes, there certainly are. Maybe 6 to 10 per cent but 21 whether that is a reliable figure to place on crime 22 scene examination and other types of item that are 23 examined I couldn't say. 24 Q. As you say, research is being undertaken in relation to 25 that? page 80 1 A. Yes. 2 Q. Obviously from a police force point of view, let alone a 3 prosecution point of view, there might be a degree of 4 trepidation that fingerprint bureaux are going to be 5 swamped by an increased volume of fingerprints of 6 doubtful value. You are careful to say that you 7 envisage probability as being a tool. Do you envisage 8 that it will be one that will be deployed 9 proportionately by the investigators to decide whether 10 they indeed do want to engage with low value minutiae in 11 particular cases? 12 A. Absolutely, I think this is part of perhaps something 13 which has not really been undertaken very well by 14 fingerprint bureaux around the world, is that, yes, you 15 have a tool, yes, you have the ability to look at these 16 low feature marks, whether you do, whether you recover 17 them, whether you look at them, is based on the value to 18 that particular investigation. So I think each 19 department will draw up its policies for how that is 20 used. It's not illogical for a department to say, "We 21 will not do that because of the volume of our work 22 because of the type of work we do we will not report 23 probabilistically we will always report very, very clear 24 marks in every case". That, as an administrative 25 decision, is valid. page 81 1 Q. Ultimately, from the point of view of moving beyond the 2 police and even the prosecution, from the courts' 3 perspective, if I understand it correctly, at least what 4 you are aiming to do with all the uncertainties that 5 surround reliability of observation characteristics you 6 are at least aiming to give a quantifiable measure for 7 the output of the observations of the examiner? 8 A. Yes. It's introducing some objectivity. It's something 9 external to the examiner and should be giving the same 10 result regardless of which examiner inputs the 11 information so, if you like, it's providing a baseline 12 measure of the weight of evidence in particular cases. 13 Q. But looking at the totality, therefore, of the 14 discipline of fingerprints you are giving an objective 15 output, however, to subjective inputs; is that correct? 16 A. To an extent, yes. 17 Q. Do you see, as a practitioner involved in various 18 committees that you are, the need for standardisation as 19 to the inputs? 20 A. Yes. 21 Q. Do you have any thoughts yourself about the appropriate 22 direction for that to proceed or is it too early to say? 23 A. I think it's too early. I think it's a piece of work 24 that naturally springs out of what we are doing. As you 25 say, we have looked already at the input from page 82 1 Fingerprint Examiners into the model and we know there's 2 a variation, as there always will be to a certain 3 extent, but I think there is quite a bit of work that 4 can be done to try and reduce that variation in terms 5 of, for example, if you're marking a bifurcation, a very 6 clear and defined definition criteria for marking that 7 is something will be required. 8 Q. But do you see in looking at this, in a sense, of the 9 chicken and the egg, that what you are doing is giving 10 the aura of scientific quantification and, therefore, 11 accuracy to inputs that are, in fact, subjective and 12 inherently variable, that perhaps the appropriate place 13 to start would be properly gauging the inputs before you 14 translate those into a mathematical expression? 15 A. That is true. In fact, to do that would be to have some 16 technology that located the minutiae in the first place 17 and, therefore, did it objectively. Such technology 18 does exist but is very unreliable. I think if we look 19 forward into the future, will there be systems that 20 replace that Fingerprint Examiner in terms of locating 21 minutiae? I think yes. 22 Q. If I am looking at it today, what is technically 23 available, if I understand what you are saying, is that 24 because there is the variability of the inputs the 25 controls for that go back to having proper procedures in page 83 1 place, structured around the ACE-V methodology, proper 2 procedures to have a quality assurance as to the inputs? 3 A. Absolutely. I think the other thing is that the model 4 that we have is laptop-based so if there was a 5 disagreement about where a particular minutiae has been 6 placed by a particular examiner it's quite possible to 7 move that and demonstrate actually in a court what 8 effect that would have on the likelihood ratio if it was 9 placed in a slightly different position. So it does 10 provide an absolute tool for, not just providing the 11 likelihood ratios and assisting examination, but 12 actually demonstrating the examination as well. 13 Q. If I just conclude in this way in trying to understand 14 the inputs. We have obviously heard of the Evett 15 & Williams that studied the observation of comparison of 16 particular individuals, you have obviously done some 17 work of that sort in your own exercise. Are you aware 18 whether there is a regular enough process within bureaux 19 of studying the extent to which identifications and 20 comparison work are susceptible to variability, 21 dependent on the observations of the individuals? 22 A. I'm not aware of study in that area, no. 23 Q. Is that something that merits being studied? 24 A. I would think so, yes. 25 Q. Why? page 84 1 A. I think, as a general rule, what has happened over the 2 years in this sort of identification side of 3 fingerprints is a lack of study into different areas and 4 I think any study that looks at the variation between 5 examiners is going to be useful in terms of informing 6 how we go forward. 7 Q. So you do yourself see it, as a practitioner in the 8 field, that there has been a lack of experimentation and 9 study in the past? 10 A. Undoubtedly, yes. 11 MR MOYNIHAN: I have no further questions. Thank you very 12 much. 13 THE CHAIRMAN: Perhaps, Mr Holmes, I might ask you first. 14 MR HOLMES: Yes, sir, there are four areas I would like to 15 cover briefly. The first relates to the usefulness of 16 note-taking; the second relates to dealing with 17 discrepancies; the third relates to the expression of 18 the examiner's opinion in court; and the fourth is a 19 single question relating to confirmation bias. 20 THE CHAIRMAN: Yes, very good. 21 Cross-examined by MR HOLMES 22 Q. Can I ask, first of all, you have spoken a bit about 23 note-taking. Your own figures record only two disputed 24 identifications in the last 15 years or so; is that 25 correct? page 85 1 A. Yes, I don't think that's a precise figure, that isn't 2 recorded but that is about right, yes. 3 Q. We have also heard evidence from Mr Logan of the PSNI 4 that in a relatively busy bureau the taking of 5 comprehensive notes is not practical. 6 What would your comment be to that? 7 A. I think, as I said before, I think, yes, it's a 8 challenge but we're in an issue of whether what should 9 be done is dictated by resources or what should be done 10 dictates the resources. 11 Q. Will there not always be a question of resources where 12 we're dealing with a service that's publicly funded? 13 A. I think that's absolutely true, yes. 14 Q. If those resources are to be applied to avoiding a 15 situation which is fairly rare, is that a good use of 16 those resources? 17 A. My personal opinion is that note-taking is a central 18 part of the process. If you look at the note-taking 19 that we are doing it is below what I would recommend and 20 part of that is resource issues and other constraints. 21 I think it's a difficult one to give a simple solution 22 to. 23 Q. Whatever your view of it is, is it practical to use this 24 as a solution? 25 A. I believe that, practically, more extensive note-taking page 86 1 could be made within fingerprint bureaux of which I'm 2 aware. 3 Q. I would also like to speak about dealing with 4 discrepancies. I have you noted as saying that you have 5 been able to explain in most cases where a discrepancy 6 occurred between the known print and the crime scene 7 print. 8 Can you have an identification with an unexplained 9 discrepancy so long as you have a sufficient volume of 10 ridge detail in sequence and agreement? 11 A. Yes, I think that's possible. Again, it's talking 12 hypothetically but if you had a particular mark with a 13 lot of correspondence with the known print and you had 14 one discrepancy for which you could not provide a 15 reasonable understanding -- I'd say it does depend a lot 16 on what that discrepancy is, it's possible. 17 Q. When you are providing an explanation about a 18 discrepancy, how much detail would you be expected to go 19 into? You are, after all, only providing a theory of 20 something you can't possibly prove, aren't you? 21 A. Yes. The explanation of discrepancy is effectively 22 opinion but I would be basing that on some observation 23 I've made. The most easy one to understand is if there 24 are two prints overlayed which has created a discrepancy 25 or a double tap, I would be attempting to show why I page 87 1 believe that was a double tap. 2 Q. You said or you made reference there to your opinion. 3 You are, when you are giving evidence, only giving your 4 opinion -- is that correct -- I think you said earlier 5 on, rather than something based on fundamentally 6 scientific principle? 7 A. I think a fingerprint identification is an opinion, yes. 8 Q. Indeed, you have identified a sort of third option 9 that's given to an examiner when you are giving what you 10 have called the comfortable option of saying that you 11 simply cannot come to a conclusion on the basis of the 12 detail that's before you. Is that right? 13 A. I think that was the phrase that was used, yes. 14 Q. Is there, therefore, room within any fingerprint 15 organisation for examiners to hold different opinions on 16 the same mark? 17 A. Yes. I think it's perfectly feasible, bearing in mind 18 the subjective nature of the process, on a particular 19 mark, it's possible for competent examiners to formulate 20 differing opinions. 21 Q. In relation to the expression of opinion in court, is it 22 ultimately the intention that a Fingerprint Expert will, 23 in future, give evidence as to a likelihood of 24 identification based on something like a percentage? 25 A. It's too early to say. I think Professor Champod and page 88 1 myself what we're saying is that we believe that 2 qualified reporting of a match is possible. So I can 3 envisage a time when a Fingerprint Examiner will say 4 there is a strong likelihood or a weak likelihood. 5 Exactly how that is articulated, whether it uses 6 numbers, whether it uses verbal scales, whether it's 7 actually explained graphically I think is too early to 8 tell. 9 Q. Finally one question in relation to confirmation bias. 10 You said earlier on that the decision on whether to do a 11 probability analysis should be based on the value of the 12 mark to the investigation. Does knowledge of the value 13 of a mark not carry with it the risk of influencing the 14 examiner's conclusions? 15 A. Yes, that's a possibility. I think this is again one of 16 those big discussions that is sweeping through a lot of 17 areas of forensic science, not just fingerprints. If 18 you work totally in the abstract with the mark and the 19 print, then you are going to examine (for example, in a 20 murder scene) every mark that's recovered. If you have 21 some knowledge or someone within the process has some 22 knowledge to say, "Well, actually you can ignore marks 1 23 to 100, I'm only interested in 102", then you can reduce 24 those work loads and be more effective. So I think the 25 decision-making about which mark should be examined page 89 1 doesn't have to be the Fingerprint Examiner's. It could 2 be another party so therefore the Fingerprint Examiner 3 doesn't know necessarily why that decision is being 4 made. 5 Q. Are you speaking about something like investigators 6 relaying to Fingerprint Examiners that they would like a 7 particular fingerprint looked at before the others or 8 they would like it looked at as a matter of priority 9 rather than the Fingerprint Examiner themselves 10 knowing the value of that particular mark to the case. 11 A. I think that resolves that confirmational bias issue, 12 yes. 13 MISS GALBRAITH: Sir, thank you. There are four points I 14 would like to raise with this witness, largely arising 15 out of the article that has become available today. 16 Firstly, I do appreciate this is to an extent going over 17 ground already covered both by Counsel for the Inquiry 18 and Mr Holmes, but I would like some clarification as to 19 Mr Chamberlain's position on unexplained differences, 20 particularly with reference to comments in the article. 21 THE CHAIRMAN: Yes. 22 MISS GALBRAITH: Secondly, to clarify a comment regarding 23 the training and experience of individual officers; 24 thirdly, to ask about cultural reasons behind errors 25 (again, it is a matter that is raised within the page 90 1 article; and, lastly, to cover the comment that has been 2 made about lack of challenge of fingerprint 3 identification being perhaps due to a lack of defence 4 expertise. 5 THE CHAIRMAN: Yes. You may ask about those matters. 6 Cross-examined by MISS GALBRAITH 7 Q. Mr Chamberlain, you just have been asked some more 8 questions regarding the issue of unexplained differences 9 within prints and this is an issue that has been of 10 considerable interest to the Inquiry. I wonder if I can 11 just ask you for some clarification as to your position 12 on that. 13 Can I perhaps ask you to look at page 69 of the 14 article that we have been looking at. If we go to the 15 second paragraph down at the end of that paragraph, what 16 is written there is: 17 "In fact as soon as a difference is observed between 18 the mark and the print that cannot be reconciled in the 19 light of tolerances defined during the analysis stage, 20 then an exclusion conclusion will be reached. Logically 21 the absence of any irreconcilable discrepancy is a 22 prerequisite for identification." 23 My understanding of that is that there is a basic 24 principle of fingerprint identification which is that 25 obviously fingerprints are unique and that would lead on page 91 1 to a principle that a conclusion of identity cannot be 2 made where there is an unexplained difference. 3 What you seem to be saying today doesn't appear to 4 be reconciled -- 5 A. Okay, if I can clarify. Perhaps I need to clarify this 6 slightly. It depends what we mean by "discrepancy". If 7 we had a bifurcation appearing in the print that was not 8 in the mark or in the mark that's not in the print, 9 clearly that is something that can't be reconciled. If 10 it is a flow of the ridge or some other artefact of the 11 ridge, pore position as such, these things possibly are 12 less of discrepancy, in a sense. Though a mechanism for 13 why that discrepancy occurred might not be obvious, if 14 there is a substantial amount of other information 15 available, it's possible that you could determine that 16 they are from the same source even though you haven't 17 got the absolute mechanism for why that discrepancy has 18 occurred. So there is a level of discrepancy 19 essentially I think is the clarification I'm putting in 20 place. Certainly if there is a mismatch, a difference, 21 in the actual minutiae themselves, then that would be 22 irreconcilable. 23 Q. There seems to be something of a sliding scale from the 24 way you are describing it. There may be a discrepancy 25 that's not a discrepancy? page 92 1 A. Not at all. I think there are just different levels of 2 discrepancy. If I explain again, if there were a 3 bifurcation appearing in the latent or the print that is 4 not in the known, then that discrepancy could not be 5 reconciled. It is quite clearly a discrepancy. 6 The type of discrepancies that I was talking about 7 are more around the flow of the ridge, perhaps the 8 appearance of a particular ridge. So it's not a sliding 9 scale, but there are different discrepancies that can 10 occur. 11 Q. Perhaps as a lay person you can help me with 12 understanding how is anyone to know what the sliding 13 scale of differences is? What is an important 14 difference? What is a reconcilable difference? Is 15 there any sort of accepted way of approaching the issues 16 of unexplained differences? 17 A. As I said, the starting principle is to actually be able 18 to articulate why there is a discrepancy there (be it 19 double tap, be it movement) within the mark. The 20 situation I was being given to talk about was where you 21 have an awful lot of agreement between the mark and the 22 print, lots of features in agreement, and one 23 slight discrepancy. In that situation, I would expect 24 to articulate to the court that that discrepancy is 25 there and I cannot explain why that discrepancy takes page 93 1 place, but my decision is based on the fact that I have 2 found substantial other agreement. 3 Q. I notice there you have used the word a "slight" 4 discrepancy. Again, it sounds from the way you're 5 explaining it like there is, for example, if there was 6 to be ridges missing or a bifurcation going the wrong 7 way that wouldn't be something you would consider as a 8 slight discrepancy? 9 A. An unfortunate turn of phrase. The discrepancy is a 10 discrepancy. It is whether or not you can explain that 11 discrepancy . 12 Q. So the explanation is the key aspect. You gave the 13 example to Mr Holmes earlier of there being a double 14 tap. Now, if there was a double tap, would you expect 15 to see some sort of evidence of crossing ridges or 16 movement or something that would allow you to reach the 17 conclusion that there may have been double tap? 18 A. Yes, I would expect to see that. 19 Q. So, again, that perhaps allows for an explanation of any 20 difference rather than there just being simply nothing 21 to explain it? 22 A. Yes. 23 Q. Can I ask you is there any science that you are aware of 24 or research that has been done in relation to an 25 identity being reached but there being any kind of page 94 1 unexplained difference? Have you ever known it to 2 happen? 3 A. Not in my personal experience, no. 4 Q. If I can move on from that, please, to ask you about a 5 comment you made in relation to the training and the 6 relevance of training and expertise of individual 7 officers. If we read on further down that page, in the 8 next paragraph you say: 9 "In the absence of dissimilarities, the examiner 10 will weigh the corresponding features in reference to 11 the standards of identification. In a nutshell, the 12 individualisation will be reached when the examiner 13 observes a level of agreement (across the three levels 14 of legible features) that exceeds the highest level of 15 correspondence he observed through his/her training and 16 experience in comparisons involving non-matching 17 entities." 18 Now, the way that that reads would appear to suggest 19 that the examination is dependent on the level of 20 training and expertise of the individual examiner. Is 21 that correct? 22 A. I think, yes, the examination is very firmly based on 23 the experience of the examiner -- training to a certain 24 extent but more the training provides the ability and 25 the mechanics to carry out that comparison. page 95 1 Q. You have spoken a little bit about the subjective nature 2 of the examination. Would this mean that a different 3 conclusion could be reached by somebody with many years' 4 of experience and training rather than a novice? 5 A. Well, I think there probably is a threshold. I don't 6 think your ability as an examiner increases just because 7 of the number of years, it's actually the work that you 8 undertake. But could a more experienced examiner 9 perhaps formulate an identification that a novice could 10 not? It's possible. 11 Q. If we were to be looking at any kind of objective 12 standard, are you aware of there being any national or 13 international accepted standard or guideline in terms of 14 training or experience that should be expected of 15 Fingerprint Officers? 16 A. Within England and Wales, there is a national training 17 scheme for examiners which I'm not familiar with the 18 scheme as it stands at the moment but presumably has a 19 certain level of assessment to be reached. Across the 20 world there is a huge variation in how Fingerprint 21 Examiners are actually trained. 22 Q. Would you agree that even within the UK there's a huge 23 variation between bureaux and individual examiners as to 24 levels of training and expertise? 25 A. There's clearly a difference in the expertise. In page 96 1 theory, the training is all the same because it's 2 through national training schools but I suspect there is 3 some variation. 4 Q. In terms of the research that you have done and are 5 aware of, are you aware of there being any published 6 accounts of error rates within identifications? 7 A. I'm not familiar with any per se, I don't think. I'm 8 aware that there are some publications that emanate, I 9 think, from the FBI around error rates but I'm not 10 cognisant with those. 11 Q. Sorry, I am just reading your answer there. You are 12 aware of some publications that emanate from the FBI? 13 A. I believe, yes. 14 Q. But nothing that's been done within the UK or anything 15 that you are aware of? 16 A. Not to my knowledge. 17 Q. Do you feel that the lack of that information or that 18 information would have been valuable in terms of your 19 work on the probability aspect of fingerprint analysis? 20 A. I'm not sure to my area of work within that which is to 21 take the system and enter it into casework, no. I'm 22 sure that the researchers are more aware of those papers 23 than I am. 24 Q. Can I ask you to look further on in the article, please, 25 to page 80. This is a part you referred to earlier, the page 97 1 second complete paragraph there, and what is being 2 considered here is the reason for a lack of challenge of 3 fingerprint identification. From the third sentence, 4 you say: 5 "First, the general perception amongst the public 6 (including judiciary) is that fingerprint evidence is 7 irrefutable and safe. This view is consistently 8 reinforced by the media. Second, there may be a lack of 9 adequate defence expertise." 10 Can I just clarify when you say defence expertise, I 11 take it you're not referring to defence Fingerprint 12 Experts but rather the solicitors and defence team that 13 may be involved? 14 A. I think we were referring to the actual defence experts 15 but actually it's probably both. 16 Q. In relation to the legal team side of it, if I can put 17 it like that, would you accept that in the entirety of a 18 criminal prosecution there may be other defences that a 19 particular accused may be using so that there isn't a 20 denial of being somewhere or touching something they 21 shouldn't have been which may mean that a challenge to 22 the fingerprint identification may not be required, may 23 not be an appropriate use of resource or time? 24 A. Absolutely. I recognise a fingerprint examination in 25 any case is a part of a larger picture and is not page 98 1 necessarily the most probative piece of evidence. 2 Q. In terms of a lack of expertise, I think, as you fairly 3 said yourself, it would be any defence Fingerprint 4 Experts that would have the expertise to advise the 5 legal team as to any possible challenge? 6 A. Yes. 7 Q. Just bear with me for a second, Mr Chamberlain. (Pause) 8 I have entirely forgotten something I said I would 9 ask you about. If we could go back in the article to 10 page 74, this isn't a part that has been put to you 11 previously. The last paragraph on that page really 12 deals with possible reasons as to why there may be 13 errors in identification. What you say there is: 14 "Research aimed at identifying the potential bias to 15 which examiners may be susceptible has made significant 16 recent progress." 17 There is reference there to Dror and Charlton: 18 "This empirical research highlights the existence 19 and the need of a full awareness of the impact of 20 contextual information on the final decision-making of 21 Fingerprint Examiners. The studies by Dror et al are 22 mainly focused on the final decision arising from the 23 comparison. We believe that a strict adherence to the 24 ACE-V protocol with a distinct analysis and comparison 25 stage is critical to mitigate the risk. Clearly there page 99 1 are dangers here that may be more pronounced given the 2 close working relationship between the examiners and the 3 police investigators." 4 Is that something that you yourself have found to be 5 of concern where there can be seen to be a close 6 relationship? 7 A. I'm not so sure "concern" is the right word. I'm not 8 able to put forward any examples where I think that's 9 caused an issue but I think, from the personal 10 perspective, it's logical that the two are separated. 11 Q. I think just in the last sentence you go on to mention 12 the importance of a clear and documented analysis which 13 would minimise the risk of any bias creeping in but you 14 say: 15 "It's not universally seen in the UK and it is 16 unlikely that marks are regularly analysed in this 17 fashion." 18 A. Yes. I think, as was mentioned before, the ACE-V 19 process, the different segments tend to be blurred and 20 run together and I think certainly in the UK my 21 experience is that you do not see a clearly documented 22 analysis as a separate stage. 23 Q. In relation to the point I made previously about the 24 perhaps lack of defence expertise and defence experts, 25 just for your comment if I can put to you what the page 100 1 exercise the Inquiry is undertaking is on the basis of 2 an inquisitorial system and I just wondered from your 3 position whether there may be use in having a report 4 provided more for the court's benefit rather than one 5 for prosecution, one for defence. 6 A. I think, again as a personal view, the inquisitorial 7 system has a lot of merits. 8 Q. Can I finally just going back briefly to the unexplained 9 differences point, you have described your probability 10 procedure, and from my understanding of the way you have 11 explained it, that programme is really based on the 12 ACE-V process properly carried out and that the analysis 13 of the mark remains crucial and the quality of the 14 analysis will be key in the ultimate probability that 15 arises out of that work. 16 A. Yes. 17 Q. With that in mind, how would any unexplained difference 18 be treated if the probability tool were to be used? 19 Would that factor into the model at all? 20 A. In a way it doesn't. The model measures the 21 correspondences between a mark and a print. If you were 22 to put in -- in a sense, you can't put in a disagreement 23 because you can only mark it on one or other. So the 24 probability does not necessarily help that but, again, 25 to reiterate, it comes back to what that discrepancy is. page 101 1 If the discrepancy is something like an additional 2 bifurcation or ridge ending, you probably wouldn't even 3 get to -- well, you wouldn't get to the probability 4 model because you already will have excluded it. If 5 it's something around a ridge flow, our model will mot 6 measure a ridge flow. So, again, it's not within the 7 scope that measurement. 8 MISS GALBRAITH: Thank you very much, Mr Chamberlain. 9 MISS GRAHAME: There is one matter I would just like to 10 clarify if I may regarding the independence of an 11 expert. 12 THE CHAIRMAN: Yes. 13 Cross-examined by MISS GRAHAME 14 Q. If you take it from me in Scotland that experts are 15 required to be independent and the purpose of an expert 16 is to assist the court, whether that be a judge sitting 17 alone or a jury, in deciding the factual issues in the 18 case. The expert is there to give advice on perhaps the 19 scientific matter or their area of expertise rather than 20 being there as advocate for one particular side. 21 It was suggested to you today that perhaps the 22 inquisitorial system made that different. In your 23 experience in England, when you give evidence in court 24 are you there to assist the judge or the jury or are you 25 there to give evidence on behalf of one party to the page 102 1 case? 2 A. I'm quite clear as a forensic scientist that my role is 3 to assist the court. So I tend to give my evidence with 4 no bias in either direction. 5 Q. Does it make any difference if you are dealing with a 6 situation which is a hearing in an inquisitorial or an 7 adversarial system? 8 A. No. 9 Q. It is possible no doubt in England, in the jurisdiction 10 in which you mainly work, or perhaps in other 11 jurisdictions, for individual barristers or solicitors 12 to challenge an expert, an individual expert, on the 13 basis that perhaps, because he only prepares reports for 14 one side, that he is in some way biased or not 15 independent such as he only ever prepares cases for the 16 defence or for the prosecutor or in the public sector. 17 A. Yes. 18 Q. Is it fair to say that, leaving aside that type of 19 challenge against an individual expert on that basis, it 20 doesn't necessarily mean that the comparison of 21 fingerprinting as a science is not some sort of 22 independent scientific discipline? 23 A. No -- if I understand you correctly. 24 MISS GRAHAME: Thank you very much. 25 THE CHAIRMAN: Ms Jones? page 103 1 MS JONES: Two quick points, sir, if I may, one on blind 2 verification and one on workload. 3 THE CHAIRMAN: Yes, very good. 4 Cross-examined by MS JONES 5 Q. Mr Chamberlain, hopefully I will not keep you very long. 6 You gave evidence earlier about the workload of FSS 7 and you said, I think, you have got six fingerprints 8 experts; is that right? 9 A. That's correct, yes. 10 Q. What I wasn't quite clear on was you said they work on 11 between 12 and 30 cases. Is that at any one time or a 12 year? 13 A. That's over the course of a year. 14 Q. Thank you. 15 The other point I wanted to ask you about was in 16 your statement you mentioned blind verification and I 17 think you say it's impractical at present but you say 18 that you are looking at a technological solution to deal 19 with that. 20 I wondered if you were able to tell us what you 21 meant by that? 22 A. I did mention this is the idea of computerising the 23 comparison process, part of which would be the 24 verification. So on the computer system, once I've 25 declared that I have a match, I will push a button for page 104 1 verification and that verification will then be sent to 2 another examiner to undertake, who -- I don't know who 3 that examiner is and that examiner may not even be 4 within my organisation. 5 Q. Would that be within your organisation, within the six 6 people who are in the organisation, do you mean? 7 A. Well, you would say naturally it would be within the 8 same organisation but potentially that verification 9 could be sent to anybody with that system so you could 10 envisage actually having verifications or some 11 verifications being undertaken by different 12 organisations. 13 MS JONES: Thank you. 14 THE CHAIRMAN: I am not sure if anybody else's LiveNote has 15 stopped but I am sure we can cope. 16 Re-examined by MR MOYNIHAN 17 Q. Mr Chamberlain, I just wanted to return to some of the 18 questions you were asked by Mr Holmes, who was the first 19 one who asked you some questions and it may simply have 20 been that I was imprecise when I asked you some 21 questions. 22 It is back to this question of asking a Fingerprint 23 Officer something in a comfortable formulation. What 24 Mr Holmes put to you was that I had suggested that I 25 would be asking in court whether a Fingerprint Officer page 105 1 had reached a conclusion or not. Plainly if I, as a 2 lawyer, since I have a bias in a case, I'm trying to 3 prove one proposition or another, if I were simply to 4 ask you have you reached no conclusion it would be very 5 comfortable because you would be at home with your pipe 6 and slippers if you had reached no conclusion, I assume, 7 in un-adversarial situation; is that fair? 8 A. That's fair. 9 Q. However, what I was, in fact, intending to discuss with 10 you was accepting, as you previously said, that 11 universally the training of Fingerprint Officers is in 12 terms of 100 per cent or nothing I, as a lawyer, might 13 for one side or the other -- this is neutral -- might 14 try to get some evidence out of a Fingerprint Officer 15 where he is less than 100 per cent certain. That's the 16 scenario. It's a question of the way I formulate the 17 question. If I ask you have you reached a conclusion as 18 a traditional Fingerprint Officer I would understand 19 that you would say no? 20 A. That's right. I think I understand what you are saying, 21 yes. 22 Q. However, if I asked a differently formulated question, 23 have you been unable to exclude either the suspect or 24 perhaps more importantly an incriminee, then I might get 25 a different answer, I might get an answer, "No, I've page 106 1 been unable to exclude"? 2 A. That's right, yes. 3 Q. You have had experience of giving that answer, in other 4 words giving evidence that you have been unable to 5 exclude? 6 A. Yes, I certainly have given evidence. 7 Q. Then simply this is, I suppose, a reflection of advocacy 8 training, if I try to chance my arm and go further and 9 convert that negative answer, "I have been unable to 10 exclude", into a positive, ie to infer a match and ask 11 you, therefore, the chances that the mark and the print 12 may come from a suspect or an incriminee, at present you 13 would simply have to give an intuitive answer to that, 14 if any? 15 A. Yes. It's as the case I described. If I could give 16 more than just unable to exclude I already would have 17 done in any case and I would have given some opinion as 18 to how likely it came from a particular individual. So 19 hopefully it wouldn't happen in court. You would 20 already be aware I could go further than just unable to 21 exclude. 22 Q. So the extent to which you would be able to give a 23 confident answer would simply be, "I am unable to 24 exclude"? 25 A. Yes. page 107 1 Q. Then one would need to arrive at it by different 2 inferential ways about how small the population is that 3 may be under consideration? 4 A. Yes. 5 Q. But perhaps more positively, if I wanted a positive 6 answer, that's the realms where the probability analysis 7 that remains under consideration really does enter the 8 field? 9 A. Absolutely. In a sense, it removes that unable to 10 exclude and replaces it with some measure of the 11 likelihood that it came from a particular individual. 12 Q. So it removes what I would call the negative, unable to 13 exclude, and puts it into some quantified positive 14 likelihood of match? 15 A. Yes. 16 MR MOYNIHAN: Thank you very much. 17 THE CHAIRMAN: Just one or two matters if you could clear up 18 for me. This Handbook of Forensic Science, your 19 article, roughly what date is it? Is it recent or -- 20 MR MOYNIHAN: Sir -- 21 THE CHAIRMAN: Did you mention it earlier? 22 MR MOYNIHAN: No, sir, I apologise. When I took the 23 photocopy from the book and we then sent the book back 24 to Strathclyde, I forgot to take the editing date. I 25 think it's relatively recent. I think it's within the page 108 1 last year. 2 A. It was published, I think, the early part of this year, 3 May or such, but it was written actually a couple of 4 years before. 5 THE CHAIRMAN: The reason I was asking was at page 74 you 6 speak of: 7 "At the time of writing no uniform competence or 8 proficiency scheme is employed throughout the UK. Plans 9 exist for its introduction." 10 I was wondering has that happened as yet? 11 A. To my knowledge and I'm a little disconnected from the 12 police, sir, to my knowledge, their plan still exists 13 there is no ... 14 THE CHAIRMAN: The plans exist. 15 Another matter I wanted to ask you about: we have 16 had an example or maybe examples in the course of the 17 Inquiry, where an image taken from the same negative has 18 appeared different to examiners and that, I'm sure, is 19 something of which you would have had experience that it 20 all depends on the way that an image is developed? 21 A. Yes. 22 THE CHAIRMAN: Is it ever possible for the examiner to 23 actually look at the fingerprint on whatever surface? I 24 mean, I'm assuming it's something that's portable and -- 25 A. Well, yes, it is. I mean, in fact, because we process page 109 1 the items as well as carry out the comparison of the 2 marks recovered the actual fingerprint on the item is 3 available to us in most of our cases. The only time 4 it's not available is if, as you say, it's a 5 non-portable item or is attached to a building. 6 Where you have a fingerprint lift, for example, 7 essentially, that is the original mark, in some respects 8 so, yes, it is possible. 9 THE CHAIRMAN: It just seemed to me it might be one should 10 go back to the original because anything else is a 11 reproduction of it which may depend on the way it has 12 been reproduced. 13 A. Within our process, obviously with a fingerprint lift, 14 which are generally imaged to produce a photograph for 15 comparison, I would always go back to the fingerprint 16 lift. In my own casework I have seen the original so I 17 have the ability to look at the photograph and the 18 original mark to see that they a true representation, so 19 I do have that ability in those cases. 20 THE CHAIRMAN: You referred at one stage in your evidence to 21 sometimes you and your colleagues would use a piece of 22 plain paper but you do have a form that you can use for 23 note-taking. 24 A. We do have forms for note-taking, yes. 25 THE CHAIRMAN: That is something you have devised yourselves page 110 1 for the purpose? 2 A. Yes. They are very simple and they are devised for that 3 process. For me the main issue is the information is 4 recorded so, to a certain extent, our procedures allow 5 variation away from that form if it is a more 6 appropriate way of documenting the information. 7 THE CHAIRMAN: I think I do know the answer to the next 8 question but you said, I hope I quote you correctly, but 9 something to the effect that fingerprint evidence is 10 part of the larger picture and not necessarily the most 11 probative piece of evidence, but I take it that doesn't 12 mean if the only evidence was a fingerprint that 13 wouldn't be or may not be sufficient? 14 A. Oh no, there are cases where fingerprints is the only, 15 physical evidence, in a case then clearly, therefore, it 16 is the most probative. 17 THE CHAIRMAN: If the Fingerprint Expert is certain then 18 that is the evidence. It is up to the court and the 19 jury whether it is accepted or not. 20 Thank you very much. I think those were all the 21 questions I wanted to ask you. Thank you for your 22 assistance and for travelling up today. 23 That, contrary to my estimate that we had to start 24 at 9.30, now means we have finished this part of the 25 evidence earlier than expected. page 111 1 We can release you from having to stay in the 2 witness box. 3 The only other question is whether it is an 4 appropriate time to deal with the question about the 5 closing statements. 6 MR MOYNIHAN: Sir, just before we do, I do apologise, the 7 estimate for starting at 9.30 this morning was simply 8 due to the fact that I had to finish Mr Chamberlain 9 today and I had no means of knowing how long it would 10 take. So I do apologise to all concerned for that. 11 THE CHAIRMAN: For some people it means early journeys. 12 MR MOYNIHAN: Sir, before I forget I have also been asked to 13 relay a message to the public. It looks as if there is 14 a fair chance we will have Mr Wertheim's evidence by 15 video link on Monday afternoon and we may be, as I 16 understand the message I have received, convening in 17 Edinburgh to have that evidence taken by video link. 18 What we can say is that if it does transpire that we 19 are doing that we will place a message on the website to 20 disclose that we are giving the evidence, the time and 21 the place and if there is an ability for members of the 22 public to attend that will be disclosed as well. 23 THE CHAIRMAN: However, any evidence given will appear on 24 the website. 25 MR MOYNIHAN: Yes, sir, any evidence given will ultimately page 112 1 appear on the website. It's just simply there may be, 2 at relatively short notice, a session of the Inquiry in 3 a venue as yet to be determined in Edinburgh on Monday 4 afternoon and we will try to give notice to the public, 5 if at all possible, of that fact. 6 THE CHAIRMAN: I assume that is because we haven't the 7 facilities here? 8 MR MOYNIHAN: That is correct. 9 THE CHAIRMAN: I think if it avoids Mr Wertheim coming from 10 the United States yet again, it is reasonable to do it 11 in that way. 12 MR MOYNIHAN: Sir, in relation to the submissions the piece 13 of information is that Mr MacPherson is not here from 14 Simpson & Marwick. We understand he might take about 15 half-an-hour, if that assists. 16 There is however one other matter that we're trying 17 to resolve with him which means that the exact duration 18 of his information for a closing statement is 19 unresolved. Subject to that it won't unduly impact on 20 others, I don't think, and therefore if you wish to have 21 a discussion today about the duration and manner or 22 order for closing statements then that would be 23 possible. 24 THE CHAIRMAN: I am quite content if it is arranged between 25 the Core Participants as to the order in which they want page 113 1 to go. It is not going to influence me in the least 2 which order I hear people in, if I may say, so it is 3 more for your own convenience. 4 My initial feeling is that it would be reasonable if 5 Turcan Connell and Digby Brown came towards the end but 6 that is merely because they have had the heaviest burden 7 in a way and that they should have longer to prepare 8 their submissions but if that is agreeable to everyone 9 then we will do it in that order and, as I say, it's not 10 going to make any difference to me who has the last 11 word, as it sometimes used to be said in trials. That 12 doesn't arise. 13 So I would be quite happy to leave it to you to 14 decide between yourselves and if you can't decide, then 15 I will decide for you but I hope that won't be 16 necessary. 17 That would conclude today's -- 18 MR MOYNIHAN: That concludes today, sir, and if I take 19 responsibility for what I am next about to say: again, 20 we can have a conversation about timing but Mr Pugh is 21 coming up from London with two of his colleagues. They 22 will be here as a panel of three to give evidence, 23 primarily Mr Pugh but if there are any technical 24 questions he is bringing colleagues with him. He is 25 only available on Tuesday and, therefore, with page 114 1 considerable apologies to all concerned, I would prefer 2 to err on the side of starting at 9.30 even if that 3 turns out to be unnecessary simply because we don't have 4 the opportunity to overspill with Mr Pugh. 5 THE CHAIRMAN: Well, since it's the last week of the public 6 part of the Inquiry I am sure everyone will tolerate one 7 more day at 9.30. 8 MR MOYNIHAN: Sir, if I can confess again, the same 9 difficulty may arise with Professor Champod. 10 THE CHAIRMAN: All right, two more days. 11 Thank you very much. So we will sit at 9.30 on 12 Tuesday but the Inquiry will officially take place, we 13 believe, on Monday subject to the notification that will 14 be given. 15 MR MOYNIHAN: May take place. The arrangements have to be 16 finalised -- may. 17 THE CHAIRMAN: Thank you. 18 (1.00 pm) 19 (Adjourned to a date and time to be fixed and published) 20 21 22 23 24 25