Polk County Sheriffâs Office asking for publicâs help finding missing elderly man with dementia Herbert Haines was last seen at the Mobil station across from the Livingston Walmart. He was driving a 2008 Chevrolet HHR when he left. (Source: Polk County Sheriff's Office Facebook page) By Gary Bass | January 9, 2021 at 1:42 PM CST - Updated January 9 at 1:42 PM POLK COUNTY, Texas (KTRE) - The Polk County Sheriffâs Office is asking for the publicâs help in finding a missing elderly man who has dementia and other health issues. According to a Facebook post, the Polk County Sheriffâs Office received a call about a missing elderly man from the Leggett area on Jan. 8.