A missing teen spurs an intense search by his parents and detectives.

In 1979, bar manager Harriet Simmons disappears during a trip to Nashville.

A single mother is discovered murdered behind a church.

Robert Hansen hunted down women for sport in the Alaskan wilderness.

A man eliminates witnesses before blowing up the Alaskan Pipeline.

A missing couple is found murdered in the backwoods of Chulitna, Alaska.

A girl is lured into a mall by an unknown man and is never seen again.

Amy's killer remains at large as a cavalcade of suspects emerges.

Amy's killer remains on the loose, and the case goes nationwide.

A Florida woman's hopes for the future are dashed by a sinister guest.

A widow and mother of three is brutally murdered at her Florida home.

A young mother is found dead and naked in her Taos, NM, home.

Fear overtakes a tiny Maine town when a couple is murdered in their home.

A family of five is found beaten to death in their Illinois home.

An 18-year-old disappears after her work shift in Boggstown, IN.

Students are alarmed when a college senior is found shot to death.