Dashcam video captured the moment a man opened fire on Arkansas officers during a traffic stop. Luis Cobos-Cenobio, 29, was pulled over in Tontitown by Cpl. Brett Thompson with the Washington County Sheriff's Office on Sunday for a traffic violation. Video shows Cobos-Cenobio open his door and unleash a barrage of gunfire at Thompson, who fires back. Cobos-Cenobio gets back in the car and drives off, video shows.