Manson was convicted for masterminding the August 1969 murders of nine people across Los Angeles, including pregnant actor Sharon Tate.
He is serving a life sentence.
Manson was released from a 10-year jail sentence in 1967 before heading to San Francisco and embracing the rise of flower-power culture.
His efforts to sell himself off as a singer-songwriter failed in professional circles, but he soon grew a loyal following of fans - particularly among young women.
Embarking on a life of sex and drug orgies, the charismatic leader called his followers his "Family" - preaching a vision of an impending race war and the messianic role he was supposed to play in it.
His desire to spark that race war - as well as possibly avenge insult for refusals for recording contracts - saw him order his followers to conduct several brutal killings.
The most famous of these was on August 8, 1969, when he ordered Charles "Tex" Watson, Susan Atkins, Patricia Krenwinkel and Linda Kasabian to target the Polanski household.
Sharon Tate, heavily pregnant at the time, was among those killed.