James Colosimo
James Big Jim Colosimo , also known as Diamond Jim, was an ItalianAmerican Mafia crime boss who immigrated 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 murder in 1920, he led a gang that became known after his death as the Chicago Outfit. Johnny Torrio was an enforcer whom Colosimo imported in 1909 from New York and who seized control after his death. Al Capone, a Torrio henchman, allegedly was directly involved in the murder.
Colosimo was born Giacomo Colosimo to Luigi Colosimo and his second wife Giuseppina Mascaro in the town of Colosimi, Province of Cosenza, Italy. He emigrated 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.
Source: Wikipedia