I respect what Call 911 says, but having been trained, re-certified in my state way too many times for my 30+ yrs, I will just say this...we must prove our target, use of sound for a radar track, she should have used this method if radar, was it radar? Let me explain, she can prove she had a track on you only by testifying she knew she had you because her radar unit, by use of sound, tracked you until you passed by at which time the sound fell off positively identifying you as her target. Now, 2 things, there can't be proof of a track if she didn't use the sound...most officers don't because it is annoying to listen to, but it should be used if you want to prove your track, second, she showed you a locked speed, meaning she did not complete the track...officers should never lock their radar...to sum this up, I would fight w/ a known lawyer schooled in traffic court...not just any lawyer...all this said, if it was laser, which I don't think it would be, you're sol...also high speeds are hard to prove unless she had the track...also she must testify her radar unit was checked for calibration before her shift, during her shift and after her shift...this is usually done by a tuning fork...a schooled traffic lawyer will ask all these questions...having said all this, I have never in my 30 yrs lost a traffic citation in court...but, I never wrote bad paper either...if an officer does their job by the book so to speak, she or he wouldn't lose either, but some officers don't....good luck...but for what you are facing...fines, insurance, etc...I would hire a very good traffic atty to at least plea it down if he can't beat it thru a technicality....