Organized Crime Figure. He gained notoriety for his part in organized crime during the American Prohibition Era and the Great Depression. Born Vincenzo Antonio Gibaldi in Licata, Sicily, the eldest son of Tommaso and Giuseppa Verderame Gibaldi, he would soon become known to the world as "Machine Gun" Jack McGurn. Growing up in the Brooklyn slums, he attended public school. He would move to Chicago with his family when he was 14. His story is unusual in the way he became a feared gangster, as unlike most gangsters, he did not grow up on the streets, but was from a good family that had given him many opportunities to be on the straight and narrow. For the most part, he had all intentions to do just that, until he began to box where he was first exposed to organized crime. He was good enough at boxing that he decided to go pro, calling himself "Battling Jack McGurn". At the time Irish boxers were more popular and got better bookings, hence his surname was changed. He would fight five matches between September of 1921 and June of 1922, winning two of the five. In early 1923, he would have a life-changing event that would lead him to crime. After his step-father was killed by three mob enforcers, he vowed revenge. After he achieved his revenge by killing the three men, he was brought to the attention of mobster Al Capone. He was placed on Capone's payroll as Capone admired the determination and drive, that he had to track down the three mobsters. As the money rolled in and he rose through the ranks, he purchased a part ownership of a speakeasy that is still open to this day, the infamous Green Mill, which was smack in the middle of the rival "Bugs" Moran territory. In 1927, the manager of Green Mill asked he to persuade comedic singer Joe E. Lewis not to move his act south to another club in rival territory, but Lewis refused. At that point, he allegedly slit Lewis's throat, cutting off a portion of his tongue and leaving Lewis for dead. However, Lewis eventually recovered and resumed his career with a scarred face and a voice that would never be the same. In 1929, the St. Valentine's Day Massacre would occur, killing seven members of his rival "Bugs" Moran gang. With his girlfriend Louise Rolfe furnishing him with a solid alibi, he was arrested but never brought to trial for any part he may have played in the massacre . Depending on the source, he may or may not been responsible for this crime. In April of 1930, Frank J. Loesch, chairman of the Chicago Crime Commission compiled his "Public Enemies" list and his named ranked fourth on this nationwide-published list. With this notoriety he was shunned from the "Outfit" with no income. Being good at the game of golf, he decided to try his hand at becoming a professional golfer. In August of 1933, the Western Open Golf championship began, he entered the competition as "Vincent Gebhardi". An alert Chicago police detective saw the name and immediately sent two sergeants to arrest him with a warrant issued the day before under the "criminal reputation law", but the charges were eventually dropped. A day after the seven-year anniversary of the St. Valentine's Massacre, he was shot and killed while bowling, by unknown three perpetrators, who were never found. He was never found guilty of any of his alleged crimes.