On the foot chase, one cop runs out of rounds but is saved by a detective who shoots the bad guy. The cop is asked if he is OK and puts his gun in his holster. Change shot and as they are walking towards the bad guy, he puts his gun in his holster again.
Grissom finds the Buick's hubcap on the right side of the road. However, in the accompanying flashback the hubcap rolls off to the left side.