Is there even a law authorizing the radar guns use? Questions of calibration, etc.?I was stopped(not on radar and only doing about 20ish in a vehicle that will go much faster)by an officer who proceeded to tell me I was at the bridge 15 minutes ago and to reach him(about 2.5 miles)in that time I had to be speeding.I told him I had made a brief stop but regardless of that and the fact I had passed 3 other officers without issue, he would want to brush up on his math before trying to make that case...