they are showing the jury autopsy photos... the back of the head wound... she is explaining to the jury why she thinks he hit a ridged surface, pointing out it had some granularity to it, pointing out the lines above and below the laceration.
He went back on some object that had a ridge on it, it wasn't smooth, it was grainy things sticking up on it ... she would give that info to LE and they could go back and find what caused it.
My words... like a cement step?
Jackson just asked about inside the garage at the scene. Sustained.