The Wisconsin Center for Investigative Journalism identifies nine cases with misleading microscopic hair or fiber comparisons; one man serving life for killing a police officer in 1994 says he is innocent.
At least three men convicted in Wisconsin have been cleared in separate cases in which DNA testing proved that earlier microscopic hair analysis was wrong
The Wisconsin Center for Investigative Journalism has found nine cases in the state involving 12 defendants that featured faulty crime laboratory hair or fiber comparison. Seven cases were flagged by the national task force re-examining cases involving FBI hair and fiber analysts. Two are cases in which DNA testing showed that Wisconsin State Crime Laboratory hair comparisons linking suspects to crime scene hairs were wrong.