Updated

Sunday, June 6 at 2 a.m. ET
Monday, June 7 at 4 a.m. ET

"On the Record" host Greta Van Susteren hosts "Summer of Evil: The Manson Murders" on Fox News Channel.

Forty years ago, a two-night murder rampage in Los Angeles by the followers of an aspiring rock star and cult leader named Charles Manson terrified the Hollywood community and made headlines across the world. In the last four decades, the savage murders of a beautiful actress named Sharon Tate and six others at the hands of a "family" of hippies have taken on mythical proportions. The story that shocked the world has it all: Sex, drugs, rock 'n' roll, movie stars and murder. It also proved to be the death knell to the hippie movement.

This hour-long exclusive Fox News documentary will take an in-depth look at how Manson's dream of rock stardom evolved into "Helter Skelter" and turned his peaceful young followers into cold-blooded killers. The Manson murders are so seared into the American public’s conscience that the book "Helter Skelter," which chronicles the case, remains the No. 1 true crime bestseller of all-time.

Video: Watch of preview of 'Summer of Evil'

"Summer of Evil" features interviews with one of the men who actually tried to help Manson break into showbiz. He will lay out the bizarre story of how when Manson failed to succeed, seven people who didn’t even know him ended up dead. Another highlight includes never-before-seen last footage of the Barker Ranch in Death valley, where Manson was arrested in 1969 and which burned down two weeks after our visit this past May.

Others featured in this FNC special include: Manson prosecutor and "Helter Skelter" co-author Vincent Bugliosi; Debra Tate, sister of Sharon Tate; Steve Dunleavey and rare archival footage of his 1988 "A Current Affair" interview with Linda Kasabian, who witnessed the Manson murders.