A Dallas Police officer was killed early Saturday morning in a traffic accident on Central Expressway. The officer was blocking the scene of an accident on the northbound side of the Expressway at Walnut Hill Lane; standing outside his patrol car with the emergency lights on when an oncoming car driving at a high rate of speed slammed into him. The officer was killed. The driver of the car that hit him was found to be intoxicated, and was arrested. Neither of the two people in that vehicle, the driver and passenger, was injured.