BANGKOK, Thailand - Police in Thailand say an heir to the Red Bull energy drink fortune accused of the hit-and-run death of a policeman tested positively for cocaine in his blood.

Police Lt. Akarawin Sukhonthawit said Saturday that while Vorayuth Yoovidhya tested positively for the drug, it was not yet clear if he ingested it before the deadly Sept. 3 crash. Vorayuth was not taken into custody until several hours after the accident.

Vorayuth, 27, is accused of driving a Ferrari that struck the officer and dragged his body down a Bangkok street earlier. His family paid the officer's siblings 3 million baht ($97,000) last week.

The case has attracted attention because of the widespread public perception that the rich and well-connected in Thailand enjoy immunity from punishment for wrongdoing.