A pregnant woman is found dead in the nude while her husband is away.

Two cases, years apart, lead police to a bizarre and grisly crime scene.

A woman is found with her throat slit and "#1" scrawled on the wall.

A father's charred remains are discovered 50 miles from home.

A close friendship ends in betrayal and murder.

A beloved small town city worker is gunned down at a laundromat.

A woman is killed and her boyfriend fights for his life.

A young mother goes missing, leaving her 1-year-old son behind.

The charred remains of an unidentified man are discovered in Florida.

A teenage girl's brutal murder devastates her adoptive parents.

Investigators struggle to find a cause for a little girl's health decline.

The disappearance of an escort leads police to discover 10 other victims.

Investigators uncover multiple suspects as they race to capture a killer.

A baby girl goes missing and her family is accused by the police.

An encounter with a prowler leads the police to a budding serial killer.

New evidence may be the key to solving a 1981 murder of four people.