I'd heard that too, and that he was treated at the hospital, but we haven't any actual medical reports yet on him. If I recall correctly, after Trayvon Martin's autopsy, it was reportrd that he had no marks or abrasions to his hands or knuckles, but at the trial experts testified there were.
It seems as though several autopsies are involved in these matters, by the coroner, ordered by the defense and/or prosecution where trials are concerned, with each side choosing the ‘facts’ supporting their respective positions. I guess the trial is necessary to sort the facts from the BS.