The last ticket I got before this last one was back in 90. The officer used a stationary radar unit while he was moving. He said I was doing 50 in a 25. I beat the ticket because the officer didn't show up in court and I asked the judge why he was using a stationary Unit while being mobile and would that affect the reading? The judge dismissed it. Since then they have gone to lasers, rapid radar, and even photo radar/laser equipment.
