right before big paul got killed according to Sammy the bull he was gonna have nino killed for all the heat he was bringing on the family. in the book gotti tapes Sammy explains to john he told nino after the trials paul was ginna clip him and told nino they did him a favor gotti didn't invite him to the meeting capo meeting were they elected gotti new boss think nino was going to trial during the time. iread that nino tried to summon gotti at this time but gotti was like wtf im the boss, never read they had problems with each other nino shot a cop I think gotti respected that and demeo helped gotti with hits I think so he had to ask nino permission.