John Dawson Dewhirst (1952 – c. August 1978) was a British teacher and amateur yachtsman who was one of nine westerners, and two Britons, known to have been killed by the Khmer Rouge during the rule of Pol Pot.
[2] For reasons that are unclear, Foxy Lady ended up in Cambodian waters and was seized, off Koh Tang, by a patrol vessel attached to Division 164 of the Revolutionary Army of Kampuchea.
Alleged photographs and forced confessions of nine missing Western yachtsmen (four Americans, two Australians, plus those of John Dewhirst and Kerry Hamill) were found in the prison files.
The confessions of Dewhirst and Hamill revealed that they had been seized by a Khmer Rouge patrol vessel near the island of Koh Tang on the evening of 13 August 1978.
Dewhirst wrote several long confessions that mixed true events in his life with false accounts of his career as a CIA agent planning to subvert the Khmer Rouge regime.
He claimed that his father (also an agent) had been paid a large bribe for inducting his son into the CIA and that his college course in Loughborough was interspersed with training as a spy.
During the 2009 trial of S-21 chief Kang Kek Iew, a former S-21 guard named Cheam Sour claimed that one of the eight Western yachtsmen held at S-21 was burned to death.
[6] On 27 August 2009, Rob Hamill appeared before the Extraordinary Chambers in the Courts of Cambodia (ECCC) as a civil party in Case 001, against Kang Kek Iew.
As "Secretary" of Democratic Kampuchea's Division 164, comprising the country's navy, Mut would have been responsible for the gunning down of Stuart Glass and the seizure of Foxy Lady's two other crew, Kerry Hamill and John Dewhirst, as well as the arrest of the other six Western yachtsmen.