I do agree though, there has to be more to the story, I just think the guy can't be innocent, unless he's a complete idiot.
Without Darwin's influence we would all (still) be idiots. Very few individuals matter in the grand scheme of things. This one matters less.
So.... suppose, suppose he went back to his pad and realized he had made friends with a terrorist. When he saw police in the area of his apartment, he wanted to just get away. He would now be on the run from both the good guys and the bad guys and in todays world....sometimes you're just not sure. If they yelled police, stop....why did he still run? Maybe he wasn't convinced who they were? Something missing??? Yeh....