I was stopped by a full of attitude cop, for what he claimed was "speeding". Even though he had no radar gun, he claimed I was doing 50 in a 35mph zone. A lie, I was doing 35. I asked him how he determined that and he said he "paced" me. He was nosing around trying to find something to charge me with, when I said, well, I won't disagree with you, but my car has a data logger, so I guess we''l have to sort it out in court. He wheeled around with a mad look on his face and asked me to explain. I told him that the car records all operational information with a time stamp, (I was fibbing, but, hey, I knew the cop was wrong about speeding), and the data can be downloaded. This made him madder, and he demanded I open my trunk (he was off his rocker- I have a wagon). Then he yelled at me about how I can't record cops. I said, sorry, it's all automatic and it does not record conversations, just data and location, via GPS. Like how long I have been stopped here at this location, how fast I was going, and speeds linked to location, turn signal use, brake use and rate of braking, acceleration etc. He realized that he was in trouble, should he give me a ticket, and I produced the data in court, so he yelled at me for being on the road late at night and drove off. These things can work both ways, you know.