Buster from Chicago was a pseudonym used for a mobster and freelance hitman of the 1930s. He is alleged to have played a key role in the Castellammarese War (1929–1931) as the assassin of Giuseppe Morello and others. Some claim that Buster was gangster (1910–1933), notably Bill Bonanno, the son of Bonanno crime family leader Joseph Bonanno, who participated in the War. Others charge that Buster is a character created by Joe Valachi to evade his responsibility for various killings.