JFK was most certainly murdered by a plot hatched by LBJ according to the last episode of “The Men Who Killed Kennedy”, which has since completely disappeared and is not including now in the box set nor is it on the ‘net any longer.
Other stuff I’ve dug through also points to this.
RFK? I don’t know. None of that makes sense other than a plot by the Mafia.
His death was a trauma; I was 12 and devastated.