 By 1925, rival gang boss Spike O'Donnell had reinforced his gang and once again instigated a war with the Saltis-McErlane mob, who also found themselves in conflict with the Sheldon Gang as well.That summer, all the major South Side gang began shooting each other.Frank McErlane was a prime suspect in the July 23 murder of George Karl and the September 3 killing of William Dickman.