It was in the long video of the first local cops to the body. Early in the video the cops, with the body camera, was told to watch out for the case shells.
He looks around, points and counts out five that are right of the body.
Toward the end of the video the cop in the orange gloves states that there are shells all around the body and the cop, with the camera, counts out eight shells. Three that are left of Crooks and the five shell cases he had counted before on Crooks right.
Do you have a link to that cop video showing the shell casings around the dead Crooks?