After a brief search, police Friday found a 78-year-old Tarpon Springs man who left his house Thursday night and was believed to have been in jeopardy. Police said Clifton Thomas is a diabetic who missed at least two shots of insulin and is possibly in the early stages of Alzheimer's disease. He was last seen leaving his home on S Levis Avenue driving a white 1993 Ford F250 pickup truck. About 3 a.m. Friday, a Hillsborough County sheriff's deputy stopped the truck with Thomas behind the wheel at Fletcher and 22nd avenues in Tampa. His family reported him missing at 8 a.m., and his truck turned up in Clearwater around 10 a.m. Tarpon Springs police Officer Paul Comini was headed to the truck when he saw Thomas sitting on a bus stop bench at Aberdeen Street and Edgewater Drive in Clearwater. Clifton was unharmed, but confused, police said.