Traffic Cops - Cameras Don't Lie

Documentary series following the traffic police as they enforce the law on some of Britain's busiest and most dangerous roads. The cops are called to an extraordinary hit-and-run incident in Cardiff. It was caught on camera, and when they see the video they cannot believe their eyes. On a quiet Sunday morning in Swansea, another pedestrian is shockingly run over and left for dead. The episode was also captured on CCTV but the footage doesn't answer the vital question: who was the driver?