Wisconsin’s tainted hair, fiber cases

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.

DNA tests in Wisconsin murder raise questions amid alleged evidence tampering

In the Ken Hudson case, experts are puzzled by tests finding no human DNA in the red substance on his left foot. Is it animal blood? A judge has granted more testing.