I got a speeding citation for going 66 mph in 40 mph zone, but the GPS in my Garmin Dashcam 56 unit was not working. I believe the cop was using LIDAR to clock me from his driver's seat, but I'm trying to determine where I was when he clocked me, and also trying to determine using video analysis how fast I was going. I have already measured the distances using Google Maps, and then using the time between two points in the video, calculated average speed (58.1 MPH from where I turn the corner and cop first could've seen me. over 2000 feet away). But can any of my fellow dash cammers here help me determine where I really was when the cop could've possibly clocked me from his driver's seat - while at the same time determining whether another vehicle was possibly obscuring the cop's sightline to me? I'd like to fight this ticket as best I can! Thank you!