“I was in Father’s bedroom at about 7.15am getting some scissors” out of a fishing tackle box on a shelf above her dad’s bed, she said, according to a police report reviewed by the New York Times. “I opened the … box and the whole thing tipped over”, causing a handgun to fall from inside, discharge and strike her father in the head as he slept in the bed.

If that's what happened, Father was a dumbass, storing a non-drop-safe firearm with a round in the chamber.