I'm going to snitch on a coworker
Who do you plan on telling when you snitch on your coworker?
I'm friends with my boss so I'll tell him directly.
While it it does not feel good to get others in trouble, it is normal to want to make sure everybody is following the rules. If you are being honest it is okay to snitch on your co-worker.
It's a shame because he was a nice guy.
Is there a way to make sure he is doing something wrong? Maybe you don't have enough evidence yet.