Forensic Files S07E04 - Who's Your Daddy

In 1988, the body of a young woman was discovered in an Ohio river under ice. Most of the evidence found at the crime scene -- like hairs, fibers and fingerprints -- had been washed away. But the victim's six year-old son unwittingly told investigators all they needed to know about the killer without saying single a word. The clue was in his genes.