If it took that many officers to detain him they need to go back and redo "Force Control Training" because it appears they didn't learn **** the first time.
So you are saying that with the mother taking a video of the encounter that they should have chosen a pain compliance technique instead of strength against strength? Having the guy on the ground screaming while they have his wrist in an Aikido hold would have inflamed the situation IMHO. Part of the psychology behind the Aikido hold is to tell the person the that if they don't stop resisting you are going to break their wrist. Capturing that statement by an officer on video would have gone viral ...