
Take a look behind the scenes of the Federal Bureau of Investigation's crime laboratory.

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.