It is strange how little they knew of him before allowing him to move in at the request of their son. Regarding the key to the gun cabinet, they said only they were to have a key, and they didn’t know he had made one. According to them, one of the house rules when he moved in was that he could only remove one of his guns from the cabinet with their permission, and with them unlocking it. They say he only asked permission twice during the 3 months he lived there; one time they said “yes” and the other time “no”. They say he was very obedient to all the house rules they set for him. If that’s true, he had to at least be mentally stable enough to fake how well he was following the rules for those 3 months. That, to me, would argue against an insanity defense.
Thanks for the detail.
It would reveal the same thing to me.