Doran Lee Vanwinkle, 53, vanished from his Tulsa, Oklahoma home in the spring of 2007. He was described as about 5 feet 10 inches to 5 feet 11 inches, slender, around 140 pounds, with brown hair and brown eyes.

Vanwinkle had serious health problems that required daily medical treatment. The vital medical equipment he depended on was found at his residence when it was located abandoned, a fact that investigators considered significant and that led authorities to deem the circumstances suspicious. Neighbors said he often walked long distances, a habit that at first seemed a possible explanation but grew less plausible over time as no word came.

The investigation remains open but has gone cold. Does anyone have information about Doran’s movements in Tulsa in spring or early summer 2007, or recall seeing him after the reported dates of disappearance?