Appreciate the response searcher99. Cleared up a lot of things - thank you.
There was no cover letter directing me to the calibration certificate but I just checked the tuning fork numbers and unfortunately they do match.
The statement was written one day after the incident - so there's no point in checking the end of shift time correct?
I suppose my argument now is speed alone is not sufficient proof and the officer has nothing else in his statement besides speed. Is there a specific way I should be formulating this? I read about "pre-trial" motions, etc - when should I be bringing this up?
One more question - if my argument is there is no proof of negligent driving, would the prosecutor lower the charge to speeding? Or will they have to drop it altogether?

