He had a back injury too that would be consistent with begin slammed into the ground/curb.
The Sanford police, who initially handled this, knew about all that. Which is why they let Mr. Z walk — it’s quite true that they hauled him into the police station for a normal investigation, but as soon as they saw how beat up he was and heard what he reported, they let him walk.
Oh, these Demon-Rats are cruising for lawsuits up their wazoos. This is the Hail Mary of Hail Marys, or else they really just don’t care that they’ll lose, they are simply resigned to causing as much damage as possible on the way out.