In 1987, two different women in Huntington, West Virginia were attacked by the same stranger. Police collected physical evidence from the scenes and soon zeroed in on Glen Woodall — a 29-year-old groundskeeper who was convicted of the crimes based on testimony from the state's leading forensic serologist, Fred Zain. 

As technology advanced, Woodall's defense team pushed for the evidence from the crime scene to be re-tested against Woodall's DNA. It didn't match. Glen Woodall was exonerated after spending five years in prison. 

But how is it that forensic evidence — which originally secured Woodall's conviction — would later prove his innocence? The answer should horrify us all... 

Sources: https://bit.ly/3bhoMVw