Dean Corll killed at least 27 boys in the early 1970s, but he had help. ID's The Serial Killer's Apprentice digs into how—and ...

The Serial Killer's Apprentice,' airing Sunday, dives into the relationship between evil mastermind Dean Corll and one of the ...

In 1975, Elmer Wayne Henley was sentenced to life in prison for his role in the Houston mass murders. Here’s everything to ...

Renowned forensic psychologist Dr. Katherine Ramsland spoke to PEOPLE about the mindset of Elmer Wayne Henley Jr., an ...

A new Investigation Discovery documentary, The Serial Killer’s Apprentice, centers on recorded conversations between Elmer ...

A man who helped lure victims for the notorious Candy Man killer back in the 1970s is speaking out on a new doc for the first ...

A new two-hour documentary, The Serial Killer’s Apprentice, is coming to Investigation Discovery. It focuses on the crimes of ...

The brand new true-crime documentary The Serial Killer’s Apprentice premieres on Investigation Discovery Sunday, Aug. 17 at 9/8c. The documentary follows Dr. Katherine Ramsland, an American ...

The parallels between Jeffrey Epstein and John Wayne Gacy’s crimes are uncanny. Both got a pass for illicit behavior before ...

New documentary from Investigation Discovery, “The Serial Killer’s Apprentice” premieres Aug. 17th. The documentary is inspired by the book The Serial Killer’s Apprentice which ...

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