Alphonse Gabriel Capone, sometimes known by the nickname "Scarface", was an American gangster and businessman who attained notoriety during the Prohibition era as the co-founder and boss of the Chicago Outfit. His seven-year reign as a crime boss ended when he went to prison at the age of 33.
John Donato Torrio was an Italian born-American mobster who helped build the Chicago Outfit in the 1920s later inherited by his protégé Al Capone. Torrio proposed a National Crime Syndicate in the 1930s and later became an adviser to Lucky Luciano and his Luciano crime family.
Vincent Drucci, also known as "The Schemer", was an American mobster during Chicago's Prohibition era who was a member of the North Side Gang, Al Capone's best known rivals. A friend of Dean O'Banion, Drucci succeeded him by becoming co-leader. He is the only American organized crime boss to have been killed by a policeman.
Vincenzo Colosimo, 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 heading a chain of brothels. From 1902 until his death in 1920, he led a gang 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.
Gunnar Kaasen was a Norwegian-born musher who delivered a cylinder containing 300,000 units of diphtheria antitoxin to Nome, Alaska, in 1925, as the last leg of a dog sled relay that saved the U.S. city from an epidemic.
Black Hand extortion was a criminal tactic used by gangsters based in major cities in the United States. In Chicago, Black Hand extortion began around 1900 and had all but faded away by 1970, replaced by the Mafia. The Mafia was initially organized by Johnny Torrio and further organized by Al Capone into the extant Chicago Outfit sometime later. Black Handers in Chicago were mostly Italian men from Calabria and Sicily who would send anonymous extortion notes to their victims emblazoned with a feared old country symbol: the "Black Hand". The Black Hand was a precursor of organized crime, although it is still a tactic practiced by the Mafia and used in organized crime to this day. The Black Hand gangsters of this time period differed from the Mafia by lacking formally structured hierarchies and codes of conduct, and many were essentially one-man operations. Black Hand blackmail was also common in New York, Boston, and New Orleans. Victims would be threatened with being beaten, shot, or have their place of business bombed if they did not pay. Starting around 1909, Black Hand activity was causing difficulties for mob boss Big Jim Colosimo, a former Black Hand gangster and owner of brothels throughout Chicago. Colosimo's life was being threatened with demands for cash to ensure his physical safety. In an effort to fix the problem, he recruited Johnny Torrio, who was a member of New York's Five Points Gang at the time, to come to Chicago. Torrio would later become the famous successor to Big Jim Colosimo and mentor Al Capone as the organized crime ruler of Chicago.
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