Part 4 of "The Secret File on J Edgar Hoover" How the Mafia blackmailed FBI president J Edgar Hoover over his alleged homosexual double life, allowing an almost unconstrained growth in organised crime during his 50-year reign. A powerful tyrant who played fast and loose with civil liberties, while collecting vast secret files on innocent people, a powerful and wicked man with secrets of his own, including rumors of his bizarre sexual behaviors.