Sort of. It was a pretty big conspiracy and a lot of people were involved. LBJ was willing to play by the Deep States rules. He probably knew it was going to happen, kept his mouth shut, and got ready to be taken over.
Personally I think George Bush Sr. was in charge of the actual hit job. He would have had the right amount of authority in the CIA at the time to be the 'officer' in charge of a political assassination.