Associate Professor Dr Theerasak Kaewamatwong, known as “Ajarn Mor Ton”, has died after suffering critical injuries in a road collision on Koh Phangan, Surat Thani province. The respected respiratory and critical care specialist was struck while walking along a roadside by a motorcycle ridden by British national Duncan Wilcock, 51, who police said tested positive for cocaine after being located.
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The incident left Dr Theerasak with severe injuries, including bleeding on the brain. Following the collision, he was urgently transferred by air to Bangkok for specialist treatment and underwent brain surgery at Ramathibodi Hospital due to his critical condition.
Police investigations led to Wilcock being charged with seven offences. These include reckless driving causing serious injury, driving after consuming alcohol or narcotics, driving without a licence or insurance and failing to stop after the collision. Officers at Koh Phangan Police Station also opposed bail after alleging that the suspect had attempted to flee Thailand.
On 7 June 2026, the Facebook page of Vimut Hospital Phaholyothin announced that Dr Theerasak had passed away. The hospital published a message expressing condolences and paying tribute to his dedication and service throughout his medical career.
The statement read: “We express our condolences and mourn the passing of Associate Professor Dr Theerasak Kaewamatwong. Throughout his service, he worked with determination and dedication. His contributions will remain remembered and stay in our memories forever. We extend our deepest sympathies and wish for his soul to rest in peace.”
Dr Theerasak was a specialist in respiratory diseases and critical care medicine at the Lung Health Centre. His death has prompted widespread expressions of sympathy from colleagues, patients and members of the medical community.
Khaosod reported that the case is to continue through the Thai legal system. Authorities have already submitted the suspect to the court for detention while criminal proceedings move forward. The death of Dr Theerasak may also have implications for additional charges being considered by prosecutors as investigations continue.
Picture courtesy of Khaosod
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Adapted by ASEAN Now Khaosod 7 June 2026