After O'Banion's murder, Chicago erupted into gang war.[2] The North Side Gang, led by George "Bugs" Moran, shot and wounded Torrio outside his home.[2] Torrio fled to Italy, leaving Al Capone as boss. The North Side Gang took aim at the Genna brothers and on May 27, 1925, Moran chased down Angelo Genna in a high-speed car chase, then shot him to death.[2] On June 13, 1925, Mike Genna was gunned down by police after a shootout with the North Siders.[2] Antonio Genna was shot to death on July 8, 1925, in an ambush. The remaining three brothers Jim, Sam, and Pete fled Chicago.[2]