I was travelling towards Frankfort in a 100km speed limit. I was stopped by a traffic officer and told i was speeding. He asked if I would like to see the gatsometer reading which I did. It merely showed 137km but no picture of my car. I asked the officer how I could see that it was my car. He merely asked if I wanted him to carry a video camera. He gave me a fine for R1500 for speeding. Am i guilty?