Jack "Machine Gun Jack" McGurn (born Vincenzo Antonio Gibaldi; ; July 2, 1902 – February 15, 1936) was a Sicilian-American boxer, mobster, and eventually a made man and caporegime in Al Capone's Chicago Outfit. Early life McGurn was born in July 1902 in Licata, Sicily, the eldest son of Tommaso and Giusepina (née Verderame) Gibaldi. Four years later, he and his mother emigrated to join his father in the United States of America, arriving at Ellis Island on November 24, 1906. McGurn grew up in Red Hook, Brooklyn where he went to Public School 46 on Union Street between Henry and Hicks streets, according to underworld historian Bill Balsamo, author of Crime Incorporated. McGurn moved to Chicago when he was 14 where he later took up a career in boxing as a teenager and changed his name to "Battling" Jack McGurn because boxers with Irish names got the better bookings. After Tommaso's death while McGurn was still young, his mother remarried to grocer Angelo DeMory, who was later murdered by Black Hand extortionists. Prohibition McGurn was introduced to Capone after his stepfather, Angelo DeMory, was assassinated by gang extortionists on January 28, 1923, and McGurn had methodically avenged his death by killing the three hitmen responsible. In fact, McGurn was already on the Outfit's payroll by the time of DeMory's death and had probably come to Capone's attention through his budding career as a prizefighter. One of McGurn’s most high-profile hits was the assassination of North Side Gang leader Earl “Hymie” Weiss on October 11, 1926. McGurn is reputed to have used his trademark Tommy Gun as he gunned down the gang leader from an open window across the street from Holy Name Cathedral. McGurn had part ownership of a speakeasy jazz club, a venue which still exists today, the infamous Green Mill, at 4802 North Broadway, in the middle of the rival "Bugs" Moran gang's territory. In November 1927, manager Danny Cohen gave McGurn the task of "persuading" comedian/singer Joe E. Lewis not to move his act south to the New Rendezvous Café, at North Clark Street and West Diversey Parkway. Lewis refused, and McGurn slit Lewis's throat, cutting off a portion of his tongue and leaving him for dead. Miraculously, Lewis eventually recovered and resumed his career, but his voice never regained its lush sound. St. Valentine's Day Massacre McGurn is associated with planning the St. Valentine's Day