A wink and a nod, and that guy is grinning... thats kinda telling ain’t it?
Johnson is smiling at him too if you really look. Some of the men in the background are looking at Albert Thomas too, paying attention to that ‘wink’.
There were always the theories that Johnson had a hand in it but we'll never know. All the main characters are dead now and things were hidden from the public even back then.
Many observers, near the car at the time, cited gunshots from other areas than the book depository where Oswald was.
The shot in the little video is the second shot as you can tell.