Originally Posted by crockett

He was allegedly leaving the scene with out his backpack "before" the bombs went off. All of those pictures were before any explosions took place. Hence the reason he looks very suspicious.

Also he actually fits the profile for the guy that is in custody. He's been reported as being a Saudi National that was here on a student visa (ie young male of college age). The guy was reportedly wearing a hoodie, but they said he had burnt hands, so who knows what time those pictures above were taken, if it's actually the same guy.