Vincent Bugliosi, who prosecuted cult leader Charles Manson and members of his so-called "family" for seven murders, then turned to writing books that took on everyone from George W. Bush to God, has died aged 80, his son said on Monday.

Bugliosi, whose book "Helter Skelter" about the Manson case became one of the best-selling true crime books of all time, died on Saturday evening at a Los Angeles hospital after a years-long battle with cancer, his son Vincent Bugliosi Jr. told Reuters.

Bugliosi was a 35-year-old Los Angeles deputy district attorney in 1970 when he brought to trial Manson and several of his followers who were all accused in the murder of seven people in a two-night spree in August 1969.