Loy Vannapho, 75, was last seen in Richland, Washington, on August 11, 2016, when he planned to pick up his wife from the Emerald Siam restaurant. He never arrived. The next day his 2005 Toyota Tundra was found abandoned at Columbia Point Marina, a location his family said he did not usually visit. Investigators reported blood inside the truck and a single sandal on the ground outside.

At the time of his disappearance he was wearing a white short-sleeved polo shirt, khaki cargo shorts and a 24-karat gold chain with a Buddhist monk charm. His family described him as a husband and devoted family man who had diabetes, had suffered a heart attack the year before and sometimes experienced memory problems. Those health vulnerabilities increased concern after he vanished.

Authorities have said the circumstances suggested possible foul play, but the case remains unsolved and the family continues to seek answers. If anyone saw Loy, his truck, or anything unusual near Columbia Point Marina or the Emerald Siam area around August 11–12, 2016, please come forward with information.