Greer shooting Kennedy by accident is a patently absurd theory but really is the only defense if Greer ever took the stand. He would admit to shooting jfk by accident in the commission of shooting back at the assassins and that explains why he lied about even seeing Kennedy let alone saying he turned only once. He died in 85. The buffoon's on the right.I stand by my initial research as to the major upper level players.
The inside the car shot in my opinion if accurate does not preclude an accidental discharge of the firearm.
I do not have instant recall at the moment but I seem to remember some vague accusations regarding the upper level people subbing inexperienced guys on the detail.
The shots from behind are a given. Also other shots in the plaza. The truth is always stranger than fiction.
In this scenario they had a "hit" in the back from long range. They had a hit from the front still. Also potentially from the front hitting the Governor. Both he and his wife swore until they day they died that shots came from the front. In the crossfire it would be understandable if the agent driving freaks out and pulls a revolver and attempts a shot to the rear. Ask yourself what would you do if you were in that drivers seat with a weapon at the ready?
Whether intentional or unintentional this scenario is supported by the actions afterward whereby the car is "wiped". If an agent was involved they HAD to cover that up immediately. I should clarify each participant AFTER the fact has no need to be "in on" the murder at all to cover up after the fact with zeal and complicity. Prevention of an open revolution, prevention of WWIII, general career CYA are all the potential unintended consequences if the truth gets out.