Mouse taken care of. Now I can go to bed. Smell lingers...
Apparently my room mates killed a rat in our kitchen last night. With a boot knife. Can't get many details out of them, seems like it was a pretty harrowing experience and they're not ready to talk about it yet. I saw the remains and yeah... from the looks of it, it turned out to be a lot harder to kill than they expected.
In other words: I really need a new place.