A community discovers that a brutal killer has been living in plain sight.

A decades-long search begins for the killer of a teenage girl.

Detectives investigate the points that connect two separate murders.

A body is found in Prison Valley and neither suspect seems to know why.

Detectives search for a missing girl and make a shocking discovery.

A Texas city mobilizes a large manhunt to nab the murderer of three teens.

A letter complicates law enforcement's investigation of murdered mother.

A man's death uncovers a dark secret hiding between an AL church's pews.

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.

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

Holiday spirits are crushed when a Massachusetts mother is murdered.

Newlyweds are murdered as a storm rattles the night in Key Largo, Florida.

A string of horrific murders ignite fear and frustration in Atlanta.

An inventive tactic gives law enforcement their first real lead.