If you watch the video closely you can see Hubbard III began resisting the moment he was ordered to face away and continued to do so/fight until he was finally subdued.  Nice try AP/LEO's bashers, but it's clear LE only used the necessary/lawful/appropriate level of force to effect the arrest.  FYI, the LEO's exhibited an incredible amount of restraint when girl friend decide to interject herself into the situation.