Charles "Tex" Watson, 65, who helped to organize the horrific slaughter of actress Sharon Tate will remain in jail for at least five more years after the California Department of Corrections and Rehabilitation, denied him for the 14th time.
Los Angeles County Deputy District Attorney Patrick Sequeira said he was pleased with the news.
He said: "There's no question these were some of the most horrific crimes in California history in terms of the brutality, the multiple stab wounds, the gunshots, the large number of victims over a two-day period.
"For a group of people to just slaughter strangers in hopes of igniting a race war is extremely horrifying."
Sequeira added that he believed Watson still is a public safety risk because: "He's a man who is at the center of the Manson family.
"He was aware of all the crimes that all the Manson family members were involved in."
Watson married and divorced in prison and has four children from conjugal visits, but his family did not respond to a request for comment that was left through his website that promotes his prison ministry,
His brief bio on the site says he was raised in Copeville, Texas, north of Dallas, and headed to California in 1967 after dropping out of college.
He says Manson, "offered utopia, but in reality, he had a destructive world view, which Charles ended up believing in and acting upon. His participation in the 1969 Manson murders is a part of history that he deeply regrets."
In the past, Watson has argued that he is a changed man who has been a model prisoner and no longer is a danger to the public.