This guy sounds like a poster child for more rigorous background checks.

There was one of those nut-balls in my neighborhood when I was a kid (my friends uncle). We used to sneak into his room and play with his guns when we were about 8 (of course he lived with his mom, my friends grandmother). He eventually got put away for good when he molested a younger kid. This guy shouldn't have been allowed to own a pair of pointy scissors.