In the Fifties, he was an agent for J. Edgar Hoover's "Top Hoodlum Program." He masterminded the first electronic surveillance of a Mafia headquarters. Sam Giancana put a $100,000 contract on his life. Now, Bill Roemer, the FBI crime expert who's had more face-to-face confrontations with mobsters than anyone in law enforcement history, tells his electrifying life story. From his key role in the lives of John and Robert Kennedy, Frank Sinatra, Phyllis...