It's funny that you used Inception especially when you had to google who Christopher Nolan was some time ago hahaha!! Don't think that I'll ever live that down :D

That guy really does look shifty, but the calm and collected guy looks even more suspicious considering the ground is tilting and the loud boom can be heard through multiple movies!! I've seen way too many murder mysteries to let that one slide. It's almost always never the most suspicious looking one!