Police in South Wales detained an 18-year-old on Monday for a lethal hit. Officers say a car rammed a motorcyclist on a busy street near Newport. The victim died at the scene. The driver parked nearby, came back, and and drove off again. A man in the car was taken to hospital with injuries. Cops also detained another man in connection with a caravan death. They let him go but imposed strict terms. He is required to stay home and report to them each week.