Back to the original post, though.

What culpability should the 83 year old man face for killing the woman? Surely he has dementia to start shooting as soon as soon as he opened his front door. State mental institution for his remaining years?

Does everyone agree that his family should have removed guns from his house - assuming they knew he was of deminished mental capacity?

Should a doctor report to police that a dementia patient has a gun at home and it should be confiscated? Should doctors be required to ask dementia patients or their families if guns are present in the house?