A crime boss, also known as a crime lord, mafia don, gang lord, gang boss, mob boss, kingpin, godfather, crime mentor or criminal mastermind, is the leader of a criminal organization.
Al Capone was a crime boss during the Prohibition era.
The American Mafia, commonly referred to in North America as the Italian-American Mafia, the Mafia, or the Mob, is a highly organized Italian American criminal society and organized crime group.
Paolo Antonio Vaccarelli (also known as Paul Kelly), founder of the Five Points Gang
Al Capone's culturally publicized violent rise to power in Chicago made him an ever-lasting criminal figure of the Prohibition era.
FBI chart of American Mafia bosses across the country in 1963.
Charles "Lucky" Luciano in 1948