Chicago gangster who was considered “the brains” behind the operations of Al Capone (Capone, Al) and Capone's successors, Frank Nitti and Tony Accardo. He was the Chicago representative in the formation of the national crime syndicate in 1934, led by Lucky Luciano, Meyer Lansky, and other New York bosses.

Ricca grew up in Naples and was convicted of murder there in 1917. He served two years in prison, murdered again, and fled to the United States (1919). After making his way to Chicago, he became Al Capone's bodyguard and eventually one of his chief aides. In 1943 he was indicted and convicted (with seven others) of conspiring to extort $1,000,000 from four film studios (Loew's, Paramount, Twentieth Century–Fox, and Warner Brothers) under threat of “union trouble.” He was sentenced to 10 years in prison but was mysteriously released after serving only three years; a congressional probe later concluded that the syndicate's influence reached to high levels of the federal executive. He was again convicted in 1959 of income-tax evasion and served 27 months of a nine-year sentence; his deportation was ordered in 1959 but was never carried out.