underboss on jerry a was written in the 80tys and all those fbi agents are convicted felons today. takedown was a great book seems like jimmy brown new Sammy was making a push into to garbage rackets and let john no. gotti on them tapes praises jimmy brown for bringing him tons of cash from the time he became boss and he knew gravno was greedy and was trying to get a rode in. that's when he telling frank loc this guy wants everything he can never have anuff ect Frankie loc keeps telling john let me go down stairs and bring Sammy up but gotti said nope should have listen to his gut. he made jimmy brown acting boss I think weeks after they all got arrested.