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

The extreme efforts taken to convict highway patrolman George Gwaltney of rape and murder.

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.

A killer's cleanliness leaves evidence of his participation in the sexual assaults and murders 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.

Investigation of the murder of three civil rights workers in 1964 Mississippi leads to the Ku Klux Klan.

Vincent "Chin" Gigante, the alleged Genovese crime boss, was brought to justice in spite of his eccentric behaviour, such as roaming Greenwich Village in his pajamas and slippers.

After surviving an attack, a victim helps the FBI close a six-month investigation into the abductions, rapes and murders of 10 Florida women.

When Claude Dallas, who poached desert wildlife, killed two game wardens, he evaded the law by living off the land.

The Unabomber eluded the FBI for 18 years until agents received a tip from Ted Kaczynski's brother, David.

A man is convicted of abducting a 5-year-old from a Christmas party based on microscopic evidence found in his vehicle.

When the World Trade Center parking garage explosion resulted in six deaths, the FBI traced the bombers' vehicle to a U-Haul dealership.

A determined team tracked the flamboyant crime boss John Gotti, who assumed control of the Gambino crime family in 1985.