BANGKOK — Thailand’s National Anti-Corruption Commission (NACC) has escalated its investigation into suspended Prime Minister Paetongtarn Shinawatra, approving a full panel inquiry into allegations of ethical misconduct related to her handling of a sensitive border dispute. The move marks the latest legal challenge for the embattled leader, who was temporarily removed from office earlier this month by the Constitutional Court over the same controversy.

Thai Prime Minister Paetongtarn Shinawatra Suspended by Constitutional Court Over Controversial Phone Call

The probe stems from complaints filed by a group of senators accusing Paetongtarn of violating constitutional ethical standards during a leaked phone conversation with former Cambodian Prime Minister Hun Sen. In the recording, the suspended premier appeared to side with Cambodia rather than Thai military officials while discussing solutions to an ongoing border conflict—a stance that sparked outrage among conservative factions and triggered mass protests demanding her removal.

If the NACC panel finds sufficient evidence, it could forward the case to the Supreme Court’s Criminal Division for Political Office Holders. Past rulings in similar cases have resulted in lifetime bans from public office. Deputy Prime Minister Phumtham Wechayachai, currently serving as acting premier, indicated Paetongtarn may request a two-week extension to submit her formal defense, which was originally due by July 16.

Suspended Thai PM Paetongtarn faces ethics investigation over leaked phone call https://t.co/anxkNkCEW6

— South China Morning Post (@SCMPNews) July 14, 2025

The controversy has plunged Paetongtarn’s coalition government into crisis just eleven months after she assumed office following the ouster of her predecessor, Srettha Thavisin, in another ethics case. Despite her suspension as prime minister, Paetongtarn retains her position as Culture Minister—a role critics argue creates a conflict of interest during the ongoing investigations.

Thai PM Paetongtarn rules out cabinet reshuffle

Political analysts note the case represents the most serious threat yet to the political legacy of the Shinawatra family, which has dominated Thai politics for two decades. The Constitutional Court’s pending verdict could not only remove Paetongtarn from office permanently but also bar her from future political participation.

-Thailand News (TN)