Two police forces are to be investigated by the Independent Office for Police Conduct (IOPC) after the families of five young people complained about delays in finding a crashed car.
Eve Smith and Darcy Ross, both 21, and Rafel Jeanne, 24, were killed when the Volkswagen Tiguan they were in left the road and collided with some trees on the outskirts of the Welsh capital, Cardiff, at the weekend.
