The best and most recent source yet on the subject is LBJ: The Mastermind of the JFK Assassination. It's superbly documented and leaves no doubt whatsoever. All he says about RFK & MLK is that's for other books. But was it just coincidence that MLK was murdered just 4 days after Johnson declared he wasn't running, or the very evening that RFK became the unquestioned front runner for the nomination, and who as president would have finally had the power to expose him. They were probably part of the deal for him not running. He hated them both. Johnson was the "nut" that Johnson accused of killing Kennedy, not Oswald. He was bipolar, experiencing waves of euphoria and depression one after the other.