Koh Tao murders
Two British backpackers were killed on Koh Tao, Thailand, in 2014. Hannah Witheridge, 23, from England, and David Miller, 24, from Jersey, were found on Sairee Beach in the early hours of 15 September. Miller’s body was found in the water and Witheridge’s on the beach. An autopsy showed Miller had been drowned and Witheridge had been repeatedly struck, with evidence suggesting she had been raped.
About two weeks later, two Burmese migrant workers, Zaw Lin and Wai Phyo, were charged with the murders, largely based on DNA evidence. They confessed after hours of interrogation. The suspects said they had been beaten and threatened to tell the police what they wanted to hear. The police and the investigation drew widespread criticism from international media, human rights groups, and legal experts for pressuring suspects, handling of evidence, and alleged torture.
In December 2015, Zaw Lin and Wai Phyo were found guilty of murder and sentenced to death. Wai Phyo was also convicted of stealing Miller’s phone. The court did not rely on the confessions, instead emphasising DNA and other evidence. The defendants’ lawyers argued the investigation was flawed, that they had no proper legal representation during interrogations, and that witnesses were intimidated. They proposed an alternate theory in which the couple had gone swimming, lost their clothes, and wandered to a nearby house; Wai Phyo supposedly found Miller’s phone and kept it. The jury accepted the prosecution’s view, and the men were sentenced to death.
Attempts to appeal the verdict failed. In August 2019, Thailand’s Supreme Court upheld the death sentences. On 14 August 2020, King Vajiralongkorn granted clemency, commuting the two men’s sentences from death to life imprisonment.
The case raised serious questions about Thailand’s justice system and the treatment of migrant workers, drawing criticism from Amnesty International, Human Rights Watch, and Thailand’s National Human Rights Commission. Critics argued that forensic work was mishandled, that confessions may have been obtained under pressure, and that the defendants did not always have fair access to legal help and independent experts. Some observers also noted gaps in CCTV evidence and concerns about the way the police conducted the investigation. British observers were eventually allowed to watch part of the process, but did not participate directly.
The murder case had a wide impact beyond the courtroom. Koh Tao, a small southern island known for diving, saw a temporary dip in tourist arrivals after the killings, though numbers recovered in the following years. The island’s economy relies on visitors and migrant workers, and the case sparked long-running debates about safety, justice, and how Thailand handles high-profile crimes involving foreigners and migrants. The events left many people around the world questioning the fairness of the investigation and the reliability of forensic evidence from the Koh Tao case.
This page was last edited on 2 February 2026, at 05:04 (CET).