Re: LIDAR 85mph 844ft
If you were cited with 22349(a), then you were charged with exceeding the statutory speed limit of 65mph. No speed survey is required to justify that type of limit. So a speed trap defense is out.
The vehicle code requires that RADAR and LASER calibration be done once every 3 years prior to the date of the alleged violation and if his was last calibrated in January of this year, that certainly satisfies that requirement.
The officer does in fact need to present a certificate of calibration to the court as part of his testimony. To obtain a copy of that certificate, you can file an Informal Discovery Request (search the forums here and/or Google the term and you'll find plenty of information).
If this is a CHP issued citation then you can bet that his equipment was undoubtedly calibrated more often than the 3 year requirement.
In addition to the calbration requirement (above), the officer must also present to the court a certificate of training on the use of Radar (24 hour course) and the use of LASER (2 hours of training). Again, if this is a CHP issued citation, and since their primary duty is traffic enforcement, then you can bet that he is qualified to use those devices and will present proof of these certifications in court.
844 feet is certainly within a reasonable distance to get an accurate reading.
Based on what you posted, your chances of defeating this are pretty slim.
I am right 97% of the time... Who cares about the other 4%!