Chapter 28: Factors contributing to the SCRO decisions on Y7 and QI2 Ross
Introduction
Absence of alternative identifications
Overview: weaknesses in the methodology applied
Detailed consideration
100% certainty
The ethos in the SCRO fingerprint bureau in 1997
An inappropriate hierarchical philosophy
Tolerances
Reverse reasoning
Repeated viewing
Target areas
Circular reasoning on points of difference where 16 points found and generalised thinking
Slack working practices such as the inappropriate use of the comparator machine
A failure to address the distinction between eliminations and identifications
Contextual information from the police
Conclusion
Precedent
Contextual bias and impropriety
Other allegations of impropriety
Chapter 29: Factors of wider relevance from the evidence of Mr Mackenzie and Mr Swann
Introduction
Mr Leadbetter
Mr Graham
Mr Berry
Mr Mackenzie and Mr Swann
Mr Mackenzie
Mr Swann
Commentary