Forensic Files II: Season 2, Episode 6

2 - 6: Knots

A building manager finds the violated and lifeless body of a young woman in the bathtub of her first apartment. When questioned, an ex-con living downstairs lies to police. But the lies alone do not prove murder and the case goes cold. Then a new forensic tool examines the old evidence. Will science point to a hidden suspect and crack the case?