Charles L. "Sonny" Liston (1932? – December 30, 1970) was an American professional boxer who competed from 1953 to 1970. A dominant contender of his era, he became world heavyweight champion in 1962 after knocking out Floyd Patterson in the first round, repeating the knockout the following year in defense of the title; in the latter fight he also became the inaugural WBC heavyweight champion. Liston was particularly known for his toughness, formidable punching power, long reach, and intimidating appearance.

In his youth, Liston turned to crime and led a gang of toughs who committed muggings and armed robberies. He became known to the St. Louis police as the "Yellow Shirt Bandit", due to the shirt he wore during robberies. Liston was caught in January 1950. He gave his age as 20, while the St. Louis Globe-Democrat reported that he was 22. Liston was convicted and sentenced to five years in Missouri State Penitentiary. His time in prison started on June 1, 1950.

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