People Magazine Investigates, The Unicorn Killer

A fire chief's wife is found burnt to death in her home. But an autopsy reveals the cause of death was a gunshot to the head, shocking a small Louisiana town.

In 1998, a gifted Philadelphia graduate student is found murdered in her bed. The hunt for her killer forces police to reassess a series of unsolved crimes.

When an 11-year-old Arizona girl vanishes while waiting for an ice cream truck, the search for her is the largest missing child investigation in Arizona history.

In 2002 a 12-year-old girl from Oregon City goes missing on her way to school. The police investigation finds no leads and then, a second girl disappears.

When Mike Williams fails to return from a duck hunting excursion, it's thought he drowned in a boating accident. 17 years later, his murdered body is found.

In 1980, a teen goes for a run around her hometown in Maine. Days later, her savagely beaten body is found. Police re-examine the case when her mum intervenes.

When three women from three different decades die or go missing under mysterious circumstances, investigators reveal they all fell in love with the same man.

A celebratory night turns deadly for the Whitaker family when they are gunned down. When a conspiracy is revealed, it tests one man's ability to forgive.

In 1969, racial tensions escalated into riots in York, Pennsylvania. Two people were killed -- a white police officer, and an African-American mum.

In 1977, a Philadelphia woman goes missing. 18 months after her disappearance, police uncover the shocking truth. After 30 years, the killer is still on the run.

In August 2000, terror strikes the Bay Area when bags of body parts start appearing in the region. During the investigation, police uncover a secret cult.

In 1992 a 19-year-old woman was brutally assaulted in California, miraculously she survived. Later, she discovered she escaped a serial killer.

After starting university students are left devastated when one of them is murdered. Soon after, someone else is killed. Is a serial killer amongst them?

In Mississippi a 19-year-old girl was set on fire, and her final words lead detectives down many wrong paths. Then, special agents hone in on a suspect.

In 1969 a woman is found murdered in Los Angeles. Police are unable to identify her for decades, detectives try to find the killer -- was it Charles Manson?