Something to be said for prison inmates self-regulating their population. Don't make a habit of wishing harm on others, but I kinda hope they forget to put this poor excuse for a human being in protective custody and he gets to hang out in general pop. for awhile.
Would a firearm have helped? Possibly, but if shot from afar, I doubt it would have made a difference.
"The best diplomat I know is a fully charged phaser bank" - Montgomery Scott