Bob just needs to come out and say mixon is suspended until this mess is cleared up. In the unlikely case he is not charged, reinstate. The second he is arrested though, he needs to be gone.
I honestly think Stoops' biggest concern right now is how to handle this thing so the players he is recruiting in the future feel he is a fair coach. The players already at OU know he is fair. But recruiting can be affected by a lot of things.....especially how he handles a situation like this. Parents, coaches and players will look back on this some day and have a strong opinion one way or the other.