Nichol's youngest daughter was shot in the head and neck. That tells me (a shooting range instructor for women's classes) that WHOEVER PULLED THE TRIGGER WAS AN INEXPERIENCED SHOOTER. This killer flinched at the sound of the pistol firing which caused the muzzle of the gun to drop. When the muzzle dropped, the bullet missed its intended target and struck the child in the neck not her head.
What Granny describes in regards to inexperience happened to a group of friends and myself handling guns for the first time at a gun range. All of us shot well the first time or two but as the session went on one friend in particular flinched repeatedly and shot off-target typically down. We had ear protection but the sound, and power of the gun, was still intimidating.