Fairfax County police officers will sometimes determine that a driver is traveling fast enough to be charged with reckless driving through a method called pacing. Pacing may involve the officer following behind the car and observing the speed of his cruiser on his speedometer. Cruiser speedometers may be certified but are not always.
Pacing also requires that the officer believes the distance between his cruiser and the other car did not change over the distance of the pace. This is a subjective statement which is difficult to verify and to prove at trial.
If an officer has charged you with reckless driving in Fairfax County by pacing, it is imperative to determine what method he used and your possible defenses.Google+