I am assuming here, since you mentioned that your registration tags were current, that you are speaking about your driver's license. Unless the officer knows you, and knows that you are driving the vehicle and that your license is expired, he would not be able to determine whether or not you were driving without a valid license. If you were stopped for this reason only (as opposed to say, speeding and the officer learns that you have an expired license when he questions you after the stop), there's something fishy about the stop.
Answered on Jan 10th, 2013 at 12:50 PM