Especially when Tua never grabbed his back. I wish I could find it but I seem to remember after the game last week a female reporter interviewed Tua on the field and mentioned a head injury to him. The thing that struck me was he never denied it and say anything about his back.
Tua, the league and the Dolphins are all responsible. Also, to let him fly back on the same night of his most recent injury was not smart. Being released from the hospital or not he should have stayed an extra day for further evaluation in Cincinnati.