We don't know the extent of the cop's injuries if any. He may have nothing but a bruise.
He appeared in court today with his hand in a bandage and lacerations to his head (from an earlier article I posted). Obviously he was also "rushed" to hospital where they kept him overnight it seems.
I don't know why you've just decided to take MerryFeather's (or w/e) side on this and try to make the cop "guilty" without knowing any facts (or with ignorning them).