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
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