I don't see why not. They would have a far easier time of it than anyone else.

[ He shrugs ]

That is not to say that I believe it impossible for someone else to have done it, mind you. Considering there was some kind of magic cast that put even I to sleep, any culprit could have had opportunity to return to their room before their roommate noticed anything amiss. However, a simple solution is more often closer to the truth. Mortals are rarely so complex.