BERLIN, Germany (AP) - A man zig-zagged a sport utility vehicle (SUV) at high speed through a pedestrian zone in the south-western German city of Trier yesterday, killing four people, including a nine-month-old child, and seriously injuring 15, officials said.The driver, identified as a 51-year-old German man born in Trier, was arrested at the scene and the vehicle was impounded, Trier police said.