The investigation against Red Bull scion Vorayuth "Boss" Yoovidhya remains active, the Public Prosecutor Commission (PPC) said in a statement yesterday.
The commission yesterday issued the statement following the recent resignation of a senior prosecutor involved in the 2012 controversial hit-and-run case against Mr Vorayuth amid an inquiry into accusations of interference by high-ranking officials to benefit the suspect.
The prosecutor, identified only as "Prosecutor C", was accused of being responsible for lowering the estimation that Mr Vorayuth's Ferrari had been travelling at 177 kilometres per hour down to just 79 km/h.
This move was said to have influenced prosecutors into dropping the charges against Mr Vorayuth.
The resignation was seen as an attempt to avoid further scrutiny.
PPC chairman, Pachara Yuttithamdamrong, said during a media briefing that the PPC will consider whether to include this development in the ongoing inquiry headed by Thanapit Mulpruek into Nate Naksuk, a former deputy attorney general, also in connection with the dropping of the charges.
The hit-and-run incident took place in August 2012 when Mr Vorayuth rammed his car into a motorcycle ridden by Pol Snr Sg Maj Wichian Klanprasert of Thong Lor police station, which resulted in the officer's death. Mr Vorayuth failed to appear in court five times before fleeing abroad later that same year.