First check if your Jeep has a governor. Mine cuts off about 94. Second, as Unlimited04 said, introduce other doubts. The police radar guns are supposed to be calibrated on certain intervals, I don't know what interval, could be yearly could be ever 5 years. Anyway, the measurement of the radar gun is inadmissible if it is not calibrated properly. Request the records for when the last time the officers radar gun was calibrated, it might very well be overdue for calibration.
2006 LJ Rubicon
1948 Willys CJ2A