What does this mean, trace? >> they are using cameras to scan your license plate and as the technology gets cheaper, those cameras are much more ubiquitous. the cameras can be anywhere from the top of the track lights to the surrounding buildings and even on the squad card themselves whether the car is moving or sitting still. the cameras are so precise. they can process thousands of license plates and it is up loaded in a police database. it is not only the plate number they are getting, they can know where you were and when. the supreme court ruled that for the police to track with a gps the...