Thai police launch inquiry into dropped charges against Red Bull heir

Decision to end case against Vorayuth Yoovidhya to be investigated after public pressure

Thai police have opened an internal investigation after charges were dropped against the billionaire Red Bull heir in a fatal hit-and-run case amid outrage over a perceived culture of impunity for the rich.

Vorayuth Boss" Yoovidhya, the grandson of the energy drink's co-founder, had been accused of killing a police officer when he crashed his Ferrari in Bangkok in 2012.