Sire,
He IS making a difference.
He can always be used as a BAD EXAMPLE , someone to have target practice with, him being the target, and several other things.
I'd let the 9mm guy out and into a room full of real American Law abiding citizens who just happen to be real gun owners, hunters, former military, etc...
Pick any empty building and turn him loose inside...
No one is totally useless. They can always be used for LIVE target practice....
Now his mommy would have a good kid...