If he had any type of mental issues (which he obviously did), shouldn’t his mother have kept her guns locked or locked up and HIDDEN THE KEY? She failed miserably in not keeping her guns locked up, given her sons mental instability. EVERYONE should keep their firearms locked up and HIDE THE KEY (and ONLY the person the guns are registered to knows where the key(s) are just in case they’re stolen if not for any other reason!!
Got a BIG problem with that word, "EVERYONE". Lotta good that'll do you when someone is comin' through the door! Where I live, everyone has guns. They keep some in cases or safes, and some in the open. Most of these folks have kids. The children learn as toddlers to leave them alone.
(not sure you're on the right forum with that kind of thinking)
What good is a locked up unloaded gun if needed in a hurry?
Just as well have a golf club for self defense.
The problem with locks is they only stop the honest.
He lived there. He knew where they were. Over time one can often discern where the key is, what the combination is, or how to cut thru the safe (as some Sawz-All owners learned the hard way). If nothing else, and considering he was hell-bent on killing, torturing her into opening a hardened safe works too.