Willie "Two-Knife" Altieri, also called Willie "Two Gun" Altieri, was an American gangster who served as the chief enforcer for Frankie Yale's Italian-American "Black-Hand" gang, one of the most powerful criminal organizations in 1920s New York City.
Willie had killed dozens of rival gangsters during the 1920s and was considered an important figure in the "Black-Hand" gang.
He was described as standing 5 feet 7 inches, weighing 170 pounds, and having blond hair and blue eyes.
In retaliation, Gibaldi with Frankie Yale's consent killed the three hitmen responsible and thus avenged his father's death.
His killing was reportedly due to a falling out with Chicago mob boss Al Capone, Yale's former underling.