I don't know if there has been any research or not or if any medical info exists but I was wondering, what would happen if, during a hostage situation, someone, LEO, armed citizen or etc. decided, based on circumstances, to take a head shot with a pistol loaded with quality SD ammo. Might the BG's reflexes, after being shot, cause his/her weapon to fire? This might not be something they have even thought about/considered but it is possible IMO.
Thanks,
Richard