1923 in organized crime

Events

Al Capone establishes his headquarters in the Chicago suburb of Cicero, Illinois.
Owney Madden is released from Sing Sing prison.
Ragen's Colts member Harry Madigan is arrested and charged with kidnapping and extortion.
Luciano crime family member Joseph Lanza organizes the United Seafood Workers (USW) of the Fulton Fish Market.
January - William Lovett is shot twice in the chest.
August - The third Labor slugger war begins after Jacob "Little Augie" Orgen's Little Augies and Solomon Schapiro ally against "Kid Dropper" Nathan Kaplan's Rough Riders during a gun battle between the gangs on Essex Street resulting in the deaths of two bystanders.
August 23 - Nathan Kaplan is killed by Jacob Orgen gunman Louis Cohen while being transported from Essex Market Court.
September 7 - Jerry O'Connor, a member of the Southside O'Donnell's, is killed by Frank McErlane in a driveby shooting. This is the first time a Thompson submachine gun popularly known as a "Tommy gun" is used.
September 17 - George Meegan, a Chicago bootlegger allied with the Southside O'Donnell's, and Southside O'Donnell member George Bucher are killed by Frank McErlane.
November 1 - William Lovett is killed by three Black Hand assassins led by Dui Cutetti.
December 1 - Thomas Keane, a beer-runner for the Southside O'Donnell's, is killed by rival gang leader Frank McErlane during a hijack attempt.