In the autumn of 1969, a 35-year-old man living in Southern California soared from near obscurity into international infamy in a matter of weeks when he was revealed as the mastermind behind two sets of ritualistic slayings, widely referred to as the Tate/LaBianca killings, executed over two nights in two separate Los Angeles neighborhoods the previous August.

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Charles Manson was the self-proclaimed head of “The Family,” a cult made up of counterculture dropouts. In addition to the Tate/LaBianca murders, authorities say they suspect Manson of influencing his followers to commit many more killings.

Manson was found guilty of first-degree murder and conspiracy to commit murder for the Tate/LaBianca killings in 1971.

In the video above, watch a brief history of Charles Manson, the notorious murders committed by Manson’s followers at his behest, and what Vincent Bugliosi, who prosecuted Manson had to say about the case four and a half decades after the killings. Then, tune in to Wednesday’s Dr. Phil for a revealing interview with Dianne Lake; who at 14, says she was the youngest known member of the Manson Family.

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Dianne Lake is the author of the new book, Member of the Family: My Story of Charles Manson, Life Inside His Cult, and the Darkness That Ended the Sixties, available now.

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‘Even Though My Parents Didn’t Introduce Me To Charlie, They Gave Me Their Blessing,’ Claims Former Manson Family Member