The KGB allegedly had evidence LBJ was behind the coup:

According to a CIA source, “it was indicated that “now” the KGB was in possession of data purporting to indicate President Johnson was responsible for the assassination of the late President John F. Kennedy.

http:// ibankcoin.com/zeropointnow/2017/10/27/jfk-file-findings-second-shooter-uk-tipoff-cia-media-infiltration-and-lbj-fingered-in-coup/#sthash.KIwXQZUy.kZptwE85.dpbs