Android app gets a college student out of a speeding ticket
As its name suggests, the free application tracks information such as traveled distance, average and max speed by using GPS data, and visualizes it on a map. When Sahas had to defend himself in traffic court, he presented the log of his trip, which clearly showed a maximum speed of only 26 mph. It turned out the officer could not recall when his laser gun was calibrated for the last time, which questioned the credibility of the laser gun data.
Even though most people do not stand a chance in traffic court, Sahas Katta was declared not guilty. The judge's decision was based mainly on the lack of evidence on the officer's part, but it is believed that the GPS data had a significant impact on the outcome.
source: Skatter Tech via SlashGear