"Machine Gun" Jack McGurn
Born Vincenzo Antonio Gibaldi, McGurn got his start on the Chicago mob scene by ruthlessly murdering the three mobsters who killed his father. He became an integral part of Al Capone's Chicago Outfit
; he was implicated in the planning of the St. Valentine's Day Massacre, but was never tried. In 1930, McGurn's name appeared fourth on a list of top 28 public enemies, issued by the Chicago Crime Commission. This made McGurn a liability to the Outfit. On February 16, 1936, McGurn, who by then had become estranged from the mob, was killed by three men with machine guns at a bowling alley.