Supposed that you are an on-the-job trainee in a private investigating company tasked to investigate a "hit and run" case. The alleged suspect was captured by a CCTV camera driving a road leading to the place of incident. The suspect denied the allegation, saying that he was driving very slowly with a constant speed. Because of the short time difference when he was caught by the camera and when the accident happened, he insisted that it was impossible that he would already be at the place when the crime took place. But when you are viewing the CCTV footage, you noticed that his car has left oil spots on the road. When you checked the spots on the site of the accident, you found out that they are still evident. So, you began to wonder if the spots can be used to investigate the motion of the car driven by the suspect and check whether he was telling the truth or not​