The rear Occipital exit wound seen by the witnesses at Parkland already disproved the bursting Parietal flap wound seen in the Zapruder Film...It gives me the creeps to imagine where and how CIA got that bursting flap image and makes me wonder if they blew someone's head off, filmed it, and cut it in to Zapruder...
The blood spatter evidence is the better kinetic, material evidence...
Of the two, the film evidence was within the cutting edge ability of the conspirators to manipulate and therefore tells you which to believe...
We have the Parkland eye witnessing that matches the blood spatter evidence...And then we have the frame 313 avulsive wound that conflicts with the other two...