There have been multiple people that met with him during the draft process come out and say there just seems to,be something "off" about him. I never met him, so I dont know.
I will offer this though. Draft night after he was selected he came off extremely poorly. Here's a guy that "slipped" to 10 and acted like he fell to the 4th round. It wasn't just what he said either. His body language, eye contact and General presence was dare I say "Cutler-esqe". That's not the composure you hope to see from the face of your franchise.