See also: 1908 in organized crime, other events of 1909, 1910 in organized crime and the list of 'years in organized crime'.

Events

• Paul Di Christina (Paulo Marchese ), leader of the New Orleans Black Hand, is killed by an Italian grocer Pietro Pepitone during an extortion attempt while attacking on Pepitone's store. Pepitone is charged with manslaughter and sentenced to twenty years however he later serves six.
• Humpty Jackson is arrested and sent to prison for attempted murder where he remains until his death in 1914.
• March 12 - New York police detective Joseph Petrosino is killed in Palermo, Sicily by Sicilian Mafia Don Vito Cascio Ferro while investigating the Le Mano Nera (The Black Hand).
• August - A violent Tong war begins after Low Hee Tong , a member of the New York Four Brothers Tong , purchases a rival Tong slave girl Bow Kum who is later murdered.

Arts and literature

Births

• Vincent Mad Dog Coll, New York bootlegger and hitman

Deaths

• Bow Kum , Tong slave girl
• March 12 - Joseph Petrosino , New York police detective