Alphonse Gabriel Capone (January 17, 1899 – January 25, 1947), sometimes known by the nickname Scarface, was an American gangster who attained fame during the Prohibition era as the co-founder and boss of the Chicago Outfit. His seven-year reign as crime boss ended when he was 33 years old.

Capone was born in Brooklyn in New York City to Italian immigrants. He was considered a Five Points Gang member who became a bouncer in organized crime premises such as brothels. In his early twenties, he moved to Chicago and became bodyguard and trusted factotum for Johnny Torrio, head of a criminal syndicate that illegally supplied alcohol—the forerunner of the Outfit—and that was politically protected through the Unione Siciliana. A conflict with the North Side Gang was instrumental in Capone's rise and fall. Torrio went into retirement after North Side gunmen almost killed him, handing control to Capone.

The federal authorities became intent on jailing Capone, and they prosecuted him for tax evasion in 1931, a federal crime and a novel strategy during the era. During the highly publicized case, the judge admitted as evidence Capone's admissions of his income and unpaid taxes during prior (and ultimately abortive) negotiations to pay the government any back taxes he owed. Capone was convicted and sentenced to 11 years in federal prison.

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