I don't have the tapes now, because all the tape recordings were turned over to [Congressman] Larry McDonald. But I listened to the tape recordings and there were conversations between Rockefeller, [J. Edgar] Hoover, where [Nelson] Rockefeller asks, "Are we going to have any problems?" And he said, "No, we aren't going to have any problems. I checked with Dulles. If they do their job we'll do our job." There are a whole bunch of tapes, because Hoover didn't realize that his phone has been tapped. [Defrauding America, Rodney Stich, 3rd edition p. 638-639]
Russ Baker's book Family of Secrets has good information on the possible role of Poppy Bush in murdering JFK.