How the FBI used forensic evidence to confirm the presence of a suspect in the bedroom of 1993 kidnapping victim Polly Klaas.

An investigation into the rape and murder of a woman on a Californian highway leads agents to discover that the chief suspect is a highway patrolman.

A man who hunted outdoorsmen, killing them with a high-powered rifle, is caught when the FBI receives a tip leading to the murder weapon.

How a killer's cleanliness left evidence of his participation in the sexual assault and murder of a woman and her two daughters.

The 11-year search for one of the killers in the murder of a vacationing couple leads to an arrest on the high seas.

The FBI break the code of silence surrounding the brutal murder of seven gangsters in a revenge killing to bring to trial an infamous New York Mafia boss.