How horribly tragic for all involved. Several gross errors in judgment.
In the current state of the world, I will not be jumping out of a closet to surprise anyone. And I will be absolutely sure before I mash the trigger. There is no recalling a bullet.
I nearly had a tragedy at home recently...Wife woke me up and said "I heard something in the front room" Picked up the KP90 and started clearing the rooms. I had just checked out the front room, when she came up behind me silently (still on carpeted area), jabs me in the ribs and says "See anything?"
After cleaning the 'stains' from the carpet, we had a long tactical discussion, focused on "Don't sneak up and poke me when I am clearing the house. It could be very ugly"