John Gleeson, an assistant US Attorney in Brooklyn, twice prosecuted John Gotti, the notorious boss of the Gambino Crime Family. Gleeson's account of both trials includes when he "flipped" underboss Sammy the Bull Gravano, killer of 19 men, and eventually brought down the entirety of the mob. This electrifying account is a fast-paced courtroom drama that exemplifies the true-crime genre while offering the uplifting story of good triumphing over evil.