Finding someone at school? spy vs spy game?

So right now I’m playing a game called gotcha, some people call it spy vs spy. And I need advice on how to find my target. I’m from University of British Columbia by the way.

The point of the game is to hunt down your target and shoot them with water, without getting hunted down yourself. Each player is given the name, faculty, year, and a mug shot of their target.

Unfortunately my target is a 2nd year Arts student. The range of different classes he takes could be anything. I have no friends who know him or even heard of him. His Facebook wall is kept confidential and he doesn’t add random people to friends.

He purposely made himself invisible for this game.
Any tips on finding an invisible man? Anything I may have overlooked?