Laser gun innaccurate

This is a video taken from my dash-cam. It records 24/7 when the vehicle is in motion. GPS speed and heading is imprinted on the video. Was busted by the cop using an LTI Ultralyte 200 model. Said I was doing 72 in a 55. Went to court w/video, ticket reduced to 68, and no points. 17MPH over vs. 13MPH is diff between major and minor speeding. One will get your insurance raised (if not canceled). The other is a free-be. This was in Pasco County Florida

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