Minneapolis Police Chief Mediero Arradando asked for a moment of silence today at his swearing in ceremony for a Wayzata officer he says was killed when the officer was struck by a vehicle on Highway 12. The officer reportedly was removing debris on the road when he was hit. Highway 12 was closed to traffic after the incident. Helicopter footage showed a silver van or S-U-V with front-end damage stopped on the side of the road.