I hate to do this but ill throw my hat in. I think the issue with this case was how and why did he have full access to his mothers guns. If I have to lock my plants in a room impenetrable to anyone else and they don't kill anyone, where the hell were her gun locks / safe storage? The issue at hand here is personal responsibility and how that was lacking in this particular situation. I will give one back door out for myself from this if it turns out he stole keys to get into the guns or got a hold of them by similar means but In my opinion if she was a responsible gun owner he should have not had access to the guns without her knowing or giving permission. He got turned away from buying guns earlier in the week hence his brothers id in his wallet so that he could pass for old enough to purchase a weapon. That's what it comes down to the government has to step in if even a minority of the certain population (Car Drivers, Gun Owners, Business regulations...etc..) is causing a perpetual danger to innocent people and that stems from a lack of personal responsibility on the minority of the specific demographic that are irresponsible. The normal safe check worked properly this time when he wasnt able to purchase a weapon right away if at all but he still got his hands on what he needed from home.