Well, technically yes but most cops use a onboard computer to record the speed/lisc/ect. The judge has a computer screen that shows him this. In the state of Ill the police officer is REQUIRED to ba at all court dates for traffic tickets. If he's not there he gets docked pay. The moral of this story is I wouldn't go there and say "Prove it" That'a the way to piss somebody off. Remember...use good TACT!!!