A person who believes they'll be caught and face consequences for committing crimes is strongly affected by knowing there is heavy surveillance of their crimina

A person who believes they'll be caught and face consequences for committing crimes is strongly affected by knowing there is heavy surveillance of their criminal activities. They're less likely to be deterred just knowing that a lot of other people will randomly have guns, in fact that makes them more likely to also have a gun and to shoot first (e.g.: that actor who was gunned down confronting someone who was stealing a catalytic converter).