dude, I'll give you the fact that Stand Your Ground laws give people like that old man a strong defense. All those cowards need to do is say they got scared and so they dropped the hammer. It works in Florida, probably will in Kansas too. There have been a rash of that kind of thing lately. All we need is go back to what,
@ActionianJacksonian said about pulling his gun every time he heard a noise to understand why. Those old fuckers live in perfect safety and when they take that gun out, they raise the risk of a shooting to everybody around them. So, naturally we are seeing it happen because assholes like him are everywhere now. And everywhere stand your ground laws are in place, it's likely that those cowardly old men will be found not guilty.
But, to give the killer a pass for his age. Nah, lock him up.