A 12-year-old girl stabbed in the name of a mythical online creature; a 24-year-old man posts his darkest fantasies before slaying three coworkers.

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In 1977, aspiring actress Christa Helm gets murdered in West Hollywood; she becomes known for her secret diary, detailing romantic encounters with celebrities; her death remains one of Hollywood's greatest mysteries.

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A Hollywood studio executive and devoted family man vanishes into thin air one night; as investigators dig into the case, they uncover dark secrets, and the details of man living a double life.

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Richard Ramirez was a satanic killer terrorizing an entire state who sexually assaulted his victims. Aileen Wuornos, a highway hooker with a gun. Doug Clark and Carol Bundy prowled the Sunset Strip for sex and victims.

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In 1979, Steve Banerjee cofounds the Chippendales male revue; as the franchise grows into an empire that generates vast sums of revenue, Banerjee does anything to protect it, including murder.

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Fame at any age can make someone feel invincible, but young stars can lose control; Johnny Lewis ("Sons of Anarchy"), Lillo Brancato Jr. ("The Sopranos") and Ricardo Medina ("Power Rangers") are profiled.

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In 1981, four people are found brutally murdered in the Hollywood Hills; the story of this horrific crime involves a prolific adult film star, a prominent LA nightclub owner, and the teenage girl caught between them.

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When obsession meets celebrity, the results can be fatal; rising music star Christina Grimmie is gunned down by a crazed fan; singer Bjork survives a bizarre plot by a man who takes his own life.

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In 1979, Steve Banerjee cofounds the Chippendales male revue; as the franchise grows into an empire that generates vast sums of revenue, Banerjee does anything to protect it, including murder.

Watch on Apple TV

Fame at any age can make someone feel invincible but what happened when young stars lose control? Johnny Lewis (Sons of Anarchy), Lilo Brancato Jr.(The Sopranos) & (Power Ranger) Ricardo Medina are profiled.

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When a D.C. intern vanishes from the most powerful city in America, rumors of an affair with a married congressman spread like wildfire. A year later her body is found but 15 years on and the case remains unsolved.

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In 1981, four people are found brutally murdered in the Hollywood Hills; the story of this horrific crime involves a prolific adult film star, a prominent LA nightclub owner, and the teenage girl caught between them.

Watch on Apple TV

When obsession meets celebrity, the results can be fatal; rising music star Christina Grimmie is gunned down by a crazed fan; singer Bjork survives a bizarre plot by a man who takes his own life.

Watch on Apple TV