[Obama_Is_Sabotaging_America]

Agent Hickey reached for his AR-15 shortly after Oswald's shot at Kennedy. Hickey acquired Oswald's location in the Book depository and was turning towards the target when the car lurched forward and he accidentally pulled the trigger.

The investigation set out to cover up the fact it was the SS that killed Kennedy, although some medical professionals believe Oswald's shot to Kennedy's neck was paralyzing and fatal in and of itself.

[LouieFisk]

“Agent Hickey reached for his AR-15 shortly after Oswald’s shot at Kennedy. Hickey acquired Oswald’s location in the Book depository and was turning towards the target when the car lurched forward”
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What is your source for that claim - Warren, the House Select investigation or ?