POLK COUNTY, Fla. – UPDATE: A missing 78-year-old Winter Haven man has been found safe. Thomas Lee Seymour was located in Tampa by Florida Highway Patrol troopers. ORIGINAL STORY: The Polk County Sheriff’s Office issued a SILVER ALERT on Saturday for a missing man with dementia. According to deputies, Thomas Lee Seymour, 78, of Winter Haven, was last seen around 10 p.m. Saturday. Officials said Seymour was missing from his home around 8:45 a.m. Sunday.