Thanks! I just finished listening to it. Seems to indicate LBJ did not want the public to believe Moscow was behind the assassination whether true or not.
Also—deeper into the rabbit hole.
One suspect for the “missing link”—the back-channel—is Jack Valenti.
But—we have no proof so far.
One other possibility is that J. Edgar Hoover gave LBJ the “full briefing”.
“This is a picture of a fake Oswald at the Cuban embassy in Mexico given to me the CIA. You can use it to claim Russian involvement if you need to fool anyone.”