Disappearance of Jim Thompson

James Harrison Wilson Thompson, an American businessman known for helping revitalize the Thai silk industry in the 1950s and 1960s, disappeared from Malaysia's Cameron Highlands on Sunday, March 26, 1967, while on an afternoon walk. He had traveled from Bangkok to Penang to spend time with longtime acquaintance Constance "Connie" Mangskau, and on Friday, March 24, the two went to the Cameron Highlands to stay at the "Moonlight" bungalow, hosted by Ling Tien Gi, a Singaporean chemist, and his American-born wife Helen Ling.

On the morning of his disappearance, the group attended Easter services at All Souls' Church. Before the service, Thompson took a short solo walk down Kamunting Road, during which he was alone for about 20 minutes, before rejoining the group. After lunch back at the bungalow, at around 1:30 pm Thompson left again for an afternoon stroll, waving goodbye to Helen Ling and Connie Mangskau as he departed via the bungalow's only access road. He was seen by a cook at a nearby Lutheran Mission bungalow around 4 pm but did not stay, and he failed to return to the "Moonlight" bungalow by 6 pm.

Police declared Thompson lost and organized a search involving more than 500 people, including army personnel, Malaysian police field force, Orang Asli trekkers, Gurkhas, reward hunters, tourists, residents, and others. The official search lasted 11 days, with sporadic further searching over subsequent months, but no trace of Thompson was found. The case drew extensive international press coverage and speculation about kidnapping, murder, a voluntary disappearance tied to Vietnam War-related work, or elimination by business rivals — but no evidence supported any of these theories, and no ransom note or body ever surfaced.

In 1985, Orang Asli settlers discovered bone fragments, without a skull, in a grave near a vegetable plot in Brinchang. Researcher Philip J. Rivers connected this discovery to the Thompson case after learning of it from a health officer in 2007, though police at the time made no link between the Brinchang find and the Thompson disappearance, which occurred in nearby Tanah Rata. Rivers has said the bones remain preserved, but no DNA confirmation tying them to Thompson has been reported.

In 2015, researcher Llewellyn "Lew" Toulmin published a search-and-rescue analysis of the original 1967 investigation, drawing on interviews, U.S. government records, and search-and-rescue science. The analysis estimated the 1967 search's "probability of success" at 30–43 percent or less, identified likely errors in search tactics, and concluded that bloodhounds found no scent trail from the bungalow, suggesting to police that Thompson may have left by car — though this evidence was described as inconclusive. The report also reviewed the unsolved murder of Thompson's sister in Chester County, Pennsylvania, months after his disappearance, concluding there was no provable link between the two cases. Thompson's disappearance remains unresolved.