Author Mark G. Murphy's new book Police Undercover is the true story of his part in investigations or organized crime, covering criminal activities which eventually led to the brutal murder of Mafia leader Paul Volpe. In this book Murphy chronicles the actions of former Satan's Choice biker, Cecil Kirby, who has been described as the best police informant ever to surface. Police Undercover is a gripping account of biker enforcement, Mafia ruthlessness, and bureaucratic bungling that took a tragic toll on a good cop.