My roommate when I first got here was really upset at the stray cats here. So, he took it upon himself to shoot a pellet gun at the cats and God knows what else. Is that against the law?

Yes, thats animal cruelty! You can get up to 3 years in prison if your caught intentionally harming an animal. You should turn your roommate in! What's next? Is he going to shoot someone who's talking to loudly. People like that, that have no regard for life, they deserve to be punished to the fullest extent of the law.

Yes. Plus it is just sadistic.

Sounds like animal cruelty. I would call animsl control