there has to be oversight on the use of body cams by the cops.  some will not turn on the camera claiming that in the heat of the action, he/she forgot to activate the camera.  so to ensure that body cams are used consistently, cops should be regulated and if not used, some kind of punishment is in order.  in the charlotte case, some of the officers did not activate their body cams, all cops at the scene should have active body cams.  then there is the case that cops protect their own, so there maybe some cover-up.