Somebody tell me this doesn't sound guilty!!?

Yea he totally did it, and you have witness of him taking. The binder have only been in one hand and its his. His excuse is lame too. When you ask him the first time he said he saw a binder and left it there, it doesn't make sense, he left a binder back and at the same time pick up yours? His story is pretty lame, the hard part is getting him to admit it. Get your other friends to back you up.