BANGKOK — As media attention again wanes, the public prosecutor said his office has yet to take action to seek the extradition of the ultra-wealthy heir to an energy drink fortune wanted for fatal hit-and-run charges.

Vorayuth “Boss” Yoovidhya, grandson of a business now spanning the globe, remains on the run overseas a month after the latest deadline for him to turn himself in expired. Although the authorities pledged to bring the 32-year-old back to Thailand to face justice, that effort seemed to end when the spotlight moved on.

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Once again procedural matters are being cited for the hold-up, much as they have been for five years since Vorayuth crashed his Ferrari into a motorcycle driven by Sgt. Maj. Wichian Klanprasert, killing him.

The Attorney General’s foreign affairs office said it cannot yet start the extradition process because police have not forwarded the necessary documents.

“We have not yet received letters from the Royal Thai Police about this,” office head Amnat Chotechai said Thursday.

Several calls seeking comment from police representatives went unreturned as of early Thursday evening.

Since the 2012 incident, Vorayuth has repeatedly refused to meet with police, citing unfair treatment.

Just three days before police finally issued an arrest warrant for Vorayuth, he left the country on a private jet bound for Singapore. Immigration police said they could not stop him from leaving because there was no court order.

The authorities say they don’t know his current whereabouts.

Somnuek Siangkong, spokesman for the Attorney General’s office, said there will be a meeting between prosecutors, police and the Ministry of Foreign Affairs in “the next few days” to discuss the extradition.

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