WAMU 88.5 - American University Radio | The Mind Is Our Medium
Now Playing

Forensic Advances Raise New Questions About Old Convictions

William Richards was convicted of murder in 1997 after a forensic dentist identified a mark on the victim as a bite. Years later, the witness recanted after seeing a new forensic analysis. As forensic technology improves, more old convictions are likely to draw new challenges around the country.