
Pol Col Piyawat Kingket, DSI's Special Criminal Litigation commissioner said investigators initially found that the allegation was founded after questioning people involving.
The document from the US's FBI showed how the US couple were taken legal action for allegedly bribing the Tourism Authority of Thailand officials.
He said the DSI however did not have the authority to probe the case because the suspects who allegedly accepted bribe and involved in the bidding collusion were high-ranking officials.
DSI caretaker director-general instructed Piyawat who heads the investigation to ask the National Counter Corruption Commission to take over the case.
Piyawat said his team did not question former TAT governor Juthamas Siriwan but only some officials involved in the bidding.
The Nation