In a teaser clip of the Peacock docuseries "Making Manson," the cult leader is heard on a tape saying he killed more people than previously thought.

A new docuseries about the cult leader features audio in which he admits to participating in multiple killings in Mexico before the notorious Manson family murders of 1969.

Serial killer Charles Manson confessed to murders before he became the leader of the notorious Manson Family cult, chilling new audio from a prison phone call reveals.

Manson rose to notoriety for orchestrating the brutal murder of actor Sharon Tate, 26, in 1969. After being arrested the following year, he appeared at the trial with a swastika carved into his head and was given the death sentence, which was changed to nine consecutive life sentences after California abolished the death penalty.

In newly released audio featured in a documentary, Manson appears to speak about previously unknown killings.

Charles Manson, the leader of the terrifying 'Manson Family' cult, claimed in audio that he committed previously unknown killings

Cult leader and killer Charles Manson admitted to committing murders before he infamously became the head of the so-called Manson Family and led his troop of followers to commit a string of brutal killings in California in 1969.

There’s a whole part of my life that nobody knows about,” Manson says in a recorded prison call. “I lived in Mexico for a while. I went to Acapulco, stole some cars. I just got involved in stuff over my head,

Newly released audio of Charles Manson has been released in which the notorious cult leader confessed to additional killings. The new phone recording of Manson from prison was featured in Peacock's new docuseries "Making Manson.