1. The science: accuracy, reliability and interpretation. Andrew P. Read
The science: accuracy, reliability and interpretation Andrew P. Read Professor of Human Genetics, University of Manchester

2. Fingerprinting A cornerstone of forensic crime scene investigation
A fingerprint ‘match’ is a matter of expert opinion
There have been several criminal cases where fingerprint evidence has proven flawed (rare), e.g. Brandon Mayfield

3. DNA profiling Sample obtained from suspect, volunteer or crime scene
Used to create DNA profile, which is entered onto DNA Database
‘Biological sample’ is also stored indefinitely

4. Using DNA evidence
Profile on database: 13,14; 29,30; 16,18; 16,17; 15,18; 11,12; 18,19; 14; 6,3.5; 16,18; X,Y.
Each profile is one in a billion
Crime scene or subject DNA can be checked against profiles on Database
A match with a complete profile provides powerful evidence
DNA evidence alone is not sufficient to prove guilt – other evidence needed

5. The interpretation of DNA
Complete profiles provide robust and reliable evidence
Problems with:
Mixed samples
Partial profiles
Contamination
Very small samples
DNA can only confirm presence at a crime scene

6. Other uses of DNA Familial searching Ethnic inferencing Surnames ?
DNA ‘photofits’ ??
Health-related information ???
Profile on database: 13,14; 29,30; 16,18; ,17; 15,18; 11,12; 18,19; 14; 6,3.5; 16,18; X,Y.