NORMAN — Eleven Oklahoma inmates have been exonerated by DNA evidence over the past two decades, including four released from death row.
That number could soon increase as the FBI looks at more than 2,000 cases nationwide involving potentially flawed forensic science evidence.
Last week, the FBI, in conjunction with the nonprofit Innocence Project and the National Association for Criminal Defense Lawyers, announced plans to review cases involving microscopic hair analysis performed between 1985 and 2000.
“With that many (cases being reviewed), there’s a good chance” some Oklahoma cases are being examined, said Paul Cates, spokesman for the Innocence Project, a New York-based group whose mission is to exonerate wrongfully convicted people.
The FBI has yet to release more specific information about the cases or give a state-by-state breakdown of them.
Authorities used to rely heavily at times on microscopic hair evidence in criminal cases but stopped doing so because of advances in DNA testing. In some wrongful conviction cases, scientists overstated the probability that hair evidence came from specific defendants.
Several of the 11 Oklahoma DNA exonerations involved faulty hair evidence, including the case of Oklahoma City man Thomas Webb, convicted in Cleveland County in 1982 of rape and burglary.
At Webb’s trial, a forensic scientist testified that hair left at the scene most likely belonged to Webb. However, DNA testing in 1996 excluded Webb, leading to his exoneration.
Webb, 53, said he wasn’t surprised there could be more cases like his, and he’s hopeful the FBI investigation will help other wrongfully convicted inmates.
“I’m just thankful that … people that are innocent, the light is going to be released,” Webb said. “I hope the innocent find justice.”
The FBI will contact state and local authorities when questionable cases are identified. The Innocence Project, along with the pro bono attorneys from several firms, will then work with defendants who may have claims of innocence and whose cases may need further DNA testing, which could confirm convictions or exonerate and correct wrongful convictions.