questions persist

Let me see if I have this straight- Newman goes out to help local cops clean graffiti around town. The cops come away from that contribution and community service thinking that hes somehow NOT good for the community and wont help them? Explain that logic please, because it has escaped me. By helping the cops that day and the community they decide he-s NOT GOOD for either? The very act of helping the cops and the community did NOT prove his intentions? How so? Dr. Mel P. Johnson