Ex-private eye Shannon works his way into New York mob operations, reporting his findings to the District Attorney's office through Asst. D. A. Bonacorsi.Ex-private eye Shannon works his way into New York mob operations, reporting his findings to the District Attorney's office through Asst. D. A. Bonacorsi.Ex-private eye Shannon works his way into New York mob operations, reporting his findings to the District Attorney's office through Asst. D. A. Bonacorsi.