Which "boss of bosses" Mafia member was behind the murder of New York City police sergeant Joseph Petrosino?
Vito Cascioferro Vito Cascioferro or Vito Cascio Ferro (January 22, 1862 – September 20, 1943), also known as Don Vito, was a prominent member of the Sicilian Mafia. He also operated for several years in the United States. He is often depicted as the "boss of bosses", although such a position does not exist in the loose structure of Cosa Nostra in Sicily.
Alphonse D'Arco Alphonse "Little Al" D'Arco (born July 28, 1932), also known as "The Professor", is a New York mobster who became the acting boss of the Lucchese crime family. He was the first boss, acting or otherwise, of a New York crime family to become a government witness.