Except we have no idea how these guns were obtained. Maybe they we're locked up and the kids stole the entire safe. These bedside safes that many people keep their handguns in are the size of a shoebox.

If there are thousands of answers, give me one. I'm not answering my own question for you.

What regulation or law doesn't exist that, if it did exist, would have prevented this? Your suggested law or regulation cannot be one that would "remove cars or licenses" from other, innocent, people.