It was a funny face, we were debating putting the picture up because it does look odd. He didn't seem off at all beforehand, and had dinner a few hours before with a friend that was very normal. We have about 5-6 other friends that saw him on campus that same day he disappeared and everyone was shocked. They talked about how they discussed career plans, etc.
OK good. Looks like we've tentatively ruled out SPMI. Next on the list would be motivations, both external and internal.