 Lanza personally advised the Office of Naval Intelligence working with local stevedores and fisherman in tracking submarines, resulting in obtaining key strategic positions in waterfront installations and effectively conduct counter-espionage activities for the Third Naval District.Although Lanza had helped secure the New York waterfront, he was convicted of extortion the following year and sentenced from 7½ to 10 years imprisonment.Upon his release in 1950, Lanza resumed his leadership role in the Fulton Fish Market and, despite a 1957 arrest for parole violation; he maintained control of the area until his death on October 11, 1968.