Vincenzo 'Big Jim' Colosimo, an Italian-American crime boss, was assassinated on May 11, 1920, at the age of 42 in Chicago, Illinois. Colosimo, also known as 'Diamond Jim' for his penchant for wearing diamond-studded jewelry, was a prominent figure in the Chicago underworld. He built a criminal empire based on prostitution, gambling, and racketeering, becoming a significant player in the city's vice district. His rise to power was facilitated by his connections with influential political figures
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