It is within the realm of physical possibilities, as would Charlie Kirk being killed by a rouge micro-meteorite, but why would that be more likely than the current hypothesis?
It's like saying you don't know what gun was used when you have the car, the gun, and the casing in the vehicle.
Couldn't anyone have fired it (off-site), left it chambered and planted it there?
It is within the realm of physical possibilities, as would Charlie Kirk being killed by a rouge micro-meteorite, but why would that be more likely than the current hypothesis?
It's like saying you don't know what gun was used when you have the car, the gun, and the casing in the vehicle.