3. The bodyguard did it
This is close to the “the butler did it” theory so popular in crime novels. The death of the lord of the manner was brought forth by the loyal butler who finally had enough. Well, sort of. The theory says that Kennedy’s assassination was the result of an accident when a secret agent fired his gun by mistake.
This all came to be when one gun expert came up with the idea during an official investigation where they tried to recreate the assassination.