James Harrison Wilson Thompson, an American businessman who helped revitalise the Thai silk industry in the 1950s and 1960s, vanished in Malaysia's Cameron Highlands on March 26, 1967.
This included the army, the Malaysian police field force, Orang Asli trekkers, Gurkhas, reward hunters, tourists, residents, mystics, scouts, missionaries, adventure seekers, American school students, and British servicemen convalescing at the resort.
[citation needed] One researcher believes a clue to Thompson's disappearance may lie in some bone fragments that were found at the Cameron Highlands in 1985.
The remains, without the skull, were discovered by Orang Asli settlers in a grave at the edge of a vegetable plot off the main road in Brinchang.
A DNA test on the bones might possibly provide a fuller answer", said Rivers at a lecture organised by the Perak Academy in Ipoh on March 26, 2010.
[citation needed] In 2015, an analysis, report, and four news articles were done by Llewellyn "Lew" Toulmin (see § External links) of the 1967 investigation from a search-and-rescue (SAR) and scientific point of view.
The analysis concluded there is no provable link between the Thompson disappearance and the murder of his sister; that the two cases are unlikely to be related; and that several persons of interest can be named, but there is no proof against any of them.
The material includes CIA, OSS, FBI, and US Department of State material, maps of the search area, 200 pages of previously unpublished letters from Thompson to a former lover and fellow art collector, detailed interviews with various actors, photos, and exact latitude and longitude of all the key locations (including possible witness locations), among other items.