Background: Joe Aiello, a prominent Sicilian-American mobster and rival of Al Capone, was a central figure in Chicago’s Italian organized crime scene during Prohibition. As leader of the Aiello Gang, he engaged in violent battles for control of the lucrative bootlegging trade and harbored a long-standing vendetta against Capone, particularly after the murder of his brother, Mike Aiello. Throughout the late 1920s, Aiello survived multiple assassination attempts orchestrated by Capone’s associates, but on October 23, 1930, he was ambushed and shot outside a Chicago apartment in a drive-by killing that effectively ended his threat. His death marked the collapse of the Aiello Gang’s challenge to Capone’s dominance, consolidating Capone’s control over Chicago’s Italian underworld and exemplifying the brutal, often public, gang wars that defined the city during Prohibition.