Can Police Officers instantly run license plates from every state?
It depends on how technolicic the police department has advance ( how much money they got to spend on high tech high speed equipment) and if they have installed computers in there patrol cars and if the computer in the cars have network asscecc and so on so forth. if they do then they can pretty much get the info from the computer pretty quick if not they have to do it the old fasion way i did when i was a Police Officer we had to radio the tag and state over the radio to a dispatcher who was at a building with computer acess and the dispatcher would read the info from the computer to us over the radio, Many smaller police departments still use this older method. but it still works.