Vincent Drucci (born Ludovico D'Ambrosio; January 1, 1898 – April 4, 1927), 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.