We never got a good replay look at it, to positively see what happened first, but, to me, it appeared that the helmet came off first, then the ball came loose. The instant a ball carrier’s helmet comes completely off, the ball is dead, so the BC couldn’t be participating after his helmet came off.
If we would have had a better replay view, I think we would have seen a TCU player grab the back of the neck opening of the BC’s helmet and pull it off, which would have been a FMM foul, and the BC would not have had to leave the game. The crew on the field doesn’t have the luxury of getting a second look for these kinds of fouls.