Though he was traveling under an assumed identity, New York newspapers and the Sicilian-Italian underworld learned of his trip across the Atlantic before he reached Europe. For years, Petrosino had hounded organized criminals in New York's Little Italy neighborhoods. Many were imprisoned or deported due to his efforts. A network of Mafiosi, apparently linked with the Morello Crime Family of New York, is believed to have arranged the shooting death of Petrosino at Palermo's Piazza Marina on the evening of March 12. Police officials in Italy were certain of the identities of the plotters and participants in the assassination, but none were successfully prosecuted.
Officially, Petrosino's mission was to gather Italian criminal records of outlaws who had made their way to New York. The records would allow recently arrived outlaws to be deported from the U.S. Petrosino's actions suggested that he also intended to establish NYPD informants within the criminal societies of southern Italy and Sicily. The first leader of the NYPD Italian Squad (which also spawned the NYPD Bomb Squad), Petrosino had recently been named to command a privately financed, undercover service within the police department. The transatlantic trip, which took him from his wife and young daughter, was his first major task in that new role.
Known for employing tenacity and toughness in numerous successful battles with lawbreakers and underworld organizations, Petrosino became a hero, as well as an important role model, for the quickly growing Italian-American community.
