Alphonse Gabriel "Al" Capone 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 the borough of 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. Capone expanded the bootlegging business through increasingly violent means, but his mutually profitable relationships with mayor William Hale Thompson and the city's police meant that Capone seemed safe from law enforcement. Capone apparently reveled in attention, such as the cheers from spectators when he appeared at ball games. He made donations to various charities and was viewed by many to be a "modern-day Robin Hood". However, the Saint Valentine's Day Massacre of gang rivals, resulting in the killing of seven men in broad daylight, damaged Chicago's image—as well as Capone's—leading influential citizens to demand governmental action and newspapers to dub him "Public Enemy No. 1". 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 negotiations to pay the government any back taxes he owed. Capone was convicted and sentenced to 11 years in federal prison. After conviction, he replaced his old defense team with experts in tax law, and his grounds for appeal were strengthened by a Supreme Court ruling, but his appeal ultimately failed. He was already showing signs of syphilitic dementia early in his sentence, and he became increasingly debilitated before being released after eight years. On January 25, 1947, Capone died of cardiac arrest after suffering a stroke.

https://en.wikipedia.org/wiki/Al_Capone