Vincenzo Colosimo (; February 16, 1878 – May 11, 1920), known as James "Big Jim" Colosimo or as "Diamond Jim", was an Italian-American Mafia crime boss who emigrated from Calabria, Italy, in 1895 and built a criminal empire in Chicago based on prostitution, gambling and racketeering. He gained power through petty crime and by heading a chain of brothels. From about 1902 until his death in 1920, he led a gang that became known after his death as the Chicago Outfit. Colosimo was assassinated on May 11, 1920, and no one was ever charged with his murder. Johnny Torrio, an enforcer whom Colosimo imported in 1909 from New York, seized control of Colosimo's businesses after his death. Al Capone, a close associate of Torrio, has been accused of involvement in Colosimo's murder, but was not yet in Chicago at the time. Early years Colosimo was born on February 16, 1878, to Luigi Colosimo and his second wife Giuseppina Mascaro in the town of Colosimi, Province of Cosenza, Italy. He emigrated from Italy to Chicago at the age of 17, starting out as a petty criminal. Colosimo attracted the attention of First Ward aldermen Michael "Hinky Dink" Kenna and John Coughlin. They made him a precinct captain and later their bagman. This gave Colosimo the political connections that helped him in his rise to power as a mob boss. Prostitution empire Later, Colosimo acquired another nickname, "Diamond Jim," because he frequently dressed in a white suit and wore diamond pins, rings and other jewelry. This, combined with his personal charm and money, helped him establish relationships with women. He had a love of both women and money, which fueled his enthusiasm for prostitution. In 1902, Colosimo married Victoria Moresco, an established Chicago madam and together they opened a second brothel. Torrio was the nephew of Moresco. According to Laurence Bergreen, "Torrio is [also] described as Colosimo’s nephew, but in the absence of any evidence to confirm the relationship, it is more likely their kinship was spiritual rather than familial." There are also references to Colosimo's wife being somehow related to John Torrio. Among his first brothels were The Victoria, on Armour Avenue (named in honor of his wife) and The Saratoga, at Dearborn and 22nd Street. Within a few years, Colosimo had expanded this to nearly 200 brothels and had also made inroads into gambling and racketeering. Colosimo was reputedly making