1

Technique first used in the United Kingdom

DNA profiling

Spread worldwide

Including the United States

2

1985

Kirk Bloodsworth

Convicted of the rape-

murder of Dawn Hamilton

Kirk Bloodsworth

3

Legal technicality

1986

Conviction quashed

Re-tried

Found guilty again

Verdict confirmed on appeal

Insisted on innocence

4

DNA tests of semen evidence

1993

Did not match Kirk Bloodsworth

Released from prison

5

DNA evidence ran through the

U.S. national DNA database

2003

Match to Kimberly Shay Ruffner

6

James Bain

Found guilty of rape in 1974

Based on eyewitness testimony

2009

DNA evidence proved his innocence

Compensated U.S. $1.75 M

7

What happens if the DNA found at

the crime scene does not match

anybody in the national database?

DNA

Other means

8

Lynette White

1988

Stabbed to death

Three men convicted

Conviction quashed on appeal

Re-investigation of crime scene

9

Crime scene had been re-decorated

2000

Bloodstains preserved under the paint

DNA sample extracted

No perfect match in the database

10

Unusual feature in the DNA

DNA analysis

600 people shared the feature

70 people shortlisted

1 person stood out

11

Teenager with a motoring offence

DNA analysis

Not him

Jeffrey Gafoor

Convicted of murder

His uncle