Good question. They would be able to compare the unfired cartridge/bullets to those recovered. On that matter, I believe Oswald was the lone assassin. The only thing that puzzles me though, is the behavior of the “kill” shot. The “magic bullet” that was found was FMJ. However, the brain area had bullet fragments, not a solid bullet found. This is very puzzling to me. Unless, Oswald used different kinds of ammo.
I believe they found the so-called “magic” or “pristine” bullet intact on a gurney.
As I recall from the Warren report, one bullet missed completely and was actually seen ricocheting off the asphalt. The “pristine” bullet caused the wound to Kennedy’s back and neck and then wounded the governor, and of course the fatal head wound.
Again, why look for supernatural causes when this terrible murderer can be explained naturally?
Because the left doesn’t want to think JFK could be so easily felled, and by an individual who was a Marxist.