FBI used flawed hair-testing method to convict thousands of people for serious crimes in the 1980s and ’90s – including some on death row.
- The FBI and the Justice Department are re-examining thousands of convictions based on forensic evidence
- In the 1980s and ’90s, FBI scientists testified in criminal cases based on flawed science
- The method involved comparing hairs from the defendant to ones obtained from the crime scene under microscope
- Presented by many scientists as irrefutable, the method is inexact
- Letters are being sent to many inmates, some on death-row, explaining their right to DNA testing to prove their innocence