I'm not saying it's not possible. It's not feasible due to the fact that LBJ and the industrial rich complex had many reasons for killing the Kennedys because of their constant threats to clean up CIA drug cartel connections in this country and also their constant probing into the black ops alien coverups and underground bases complexes.
If you saw the actual head shot from the left front, it's doubtful that JFK did that by himself with a pistol accident.