Severed heads were also found in his refrigerator while an alter of candles and human skulls was discovered in his closet.
Cult leader Charles Manson became a pop icon after his "Family" carried out two ritualistic mass murders in Los Angeles over two nights in August 1969.
Inspired by the Beatles' White Album, they stabbed the victims dozens of times and wrote "pig" and "Helter Skelter" on the walls in blood.
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