Bobby Beausoleil is a member of the former Charles Manson "Family", and a murderer.

Born Robert Kenneth Beausoleil on 6 November 1947, in Santa Barbara, California, he was convicted of, and sentenced to death for, killing music teacher Gary Hinman on July 25, 1969. His death sentence was commuted to life imprisonment.

He composed a soundtrack for Kenneth Anger's movie Lucifier Rising, in which he also appears. He also appeared in "Invocation of My Demon Brother" and a soft porn film known variously as The Ramrodder and Savage Passion. He later joined a band he was in called The Milky Way. [source?]

He met Charlie Manson in Topanga Canyon in 1966 and later went on to be one of the group who killed Hinman, allegedly for defaulting in a drugs deal. Accompanying Beausoleil that night were Susan Atkins and Mary Brunner, both later involved in other murders. (Main article: Charles Manson)

Beausoleil has told various incompatible stories about his role in the Hinman murder. In one version, detailed in a Oui interview, conducted in summer, 1980 and published in November, 1981, Beausoleil had come to collect $1000 related to a mescaline transaction. He was under pressure from the Straight Satans, a motorcycle gang, who were unimpressed with their purchase. Hinman refused to pay back the money, and allegedly pulled a knife on Beausoleil. Beausoleil's versions of the murder were also inconsistent with the autopsy performed on Hinman, which depict a murder by torture, and with other testimony which described Manson slicing Hinman's ear with a sword (actually a long knife) before his followers killed him.

Beausoleil was interested in music and was a fan of The Byrds. Opening for The Byrds one night was a racially integrated band, called The Grass Roots , fronted by Authur Lee. Bobby convinced Lee to let him join the group. During this time promoted a private gay club called the Brave New World to the hippies of the Sunset Strip. According to Beausoleil, when Arthur Lee changed his band's name to Love, it was in honor of Bobby, sometimes called Bummer Bob, who had a particular Grass Roots-era nickname of Cupid.