as far as hoover denying there was a mafia, of course they had something on him. he gave them all a pass. the fbi only went after lansky after hoover was dead. in died in 1972.hoover was responsible for the growth of the mob,he refused to investigate them , and he never bothered the klan in the south either, as long as he was the head of the fbi. under hoover the fbi was a political organization not a crime fighting organization. all the time and energy was spent going after a handful of commies, j. edgar hoover was the biggest fraud in American history.