Vincent T. Bugliosi Jr. was an American prosecutor and author who served as Deputy District Attorney for the Los Angeles County District Attorney's Office between 1964 and 1972. He became best known for successfully prosecuting Charles Manson and other defendants accused of the Tate–LaBianca murders that took place between August 9 and August 10, 1969.

Charles Milles Manson was an American criminal, cult leader and musician who led the Manson Family, a cult based in California, in the late 1960s. Some of the members committed a series of at least nine murders at four locations in July and August 1969. In 1971, Manson was convicted of first-degree murder and conspiracy to commit murder for the deaths of seven people, including the film actress Sharon Tate. The prosecution contended that, while Manson never directly ordered the murders, his ideology constituted an overt act of conspiracy.