Thomas William Barkfelt, a 56-year-old white man from Fairland, Oklahoma, was last seen on October 12, 2015, in Pineville, Missouri. He is described as about 5 feet 10 inches and 165–175 pounds, with graying brown hair, blue eyes, visible scars from recent brain surgery on his head and face, a scar on his left forearm where a tattoo was partially removed, and tattoos on both upper arms. Family reported he had a brain tumor removed in February 2015, suffered seizures, needed medication, and had experienced changes in behavior that may have included confusion or delusions.

On October 24, 2015, his light blue Ford Ranger was found unlocked and towed from Spavinaw Hills State Game Refuge southwest of Eucha Lake Dam in Delaware County, Oklahoma; the truck had been there since October 15 and contained his wallet, phone, and keys. Shoes were also reported found that day in Delaware County. Searches were conducted but Thomas has not been located.

Did anyone in northeastern Oklahoma or McDonald County see Thomas or his truck around October 12–15, 2015?