Vincent T. Bugliosi Jr. was an American prosecutor and author renowned for his role as Deputy District Attorney for the Los Angeles County District Attorney's Office from 1964 to 1972. His most notable achievement came from successfully prosecuting Charles Manson and other defendants in the Tate–LaBianca murders, a notorious case that unfolded between August 9 and August 10, 1969.

Following his tenure at the District Attorney's Office, Bugliosi embarked on a private practice, which included defense cases for criminal trials. Despite two unsuccessful bids for the DA's office, he began a prolific writing career, focusing on significant criminal cases. Among his claims in his books, he asserted that O.J. Simpson and Lee Harvey Oswald were guilty of the crimes accused of them, and in his later works, he argued that George W. Bush should be prosecuted for murder. Bugliosi resided in Pasadena, California, until his passing.