Roger Stone wrote a very interesting book about how LBJ changed the route of the parade and laid at the bottom of his limo 20 seconds before the shooting started and to 30 seconds after it was completed. LBJ made a pass at Jackie-O on the plane back to Washington DC. Texas mob with connections to the hunt brothers. There is also a lot of interesting stuff about Papa Pilgrim who was involved in a lot of breakin robberies of survivors. It really looks more like an FBI with Texas Mob action to put LBJ in the oval office.

I think that had Nixon asked for a recount, Kennedy would not have become POTUS. Nixon was driven from then on by paranoia to do the breakin at the Watergate hotel.