HOUSTON A Silver Alert was issued for a 71-year-old man with a cognitive impairment Tuesday afternoon, according to the Harris County Sheriffs Office. James Hurrington was last seen at 3 p.m. on July 4 at 10000 Northwest Park Drive, deputies said. Hurrington was driving a black 2018 Nissan Frontier with TX license plate KTB2448. Officials believe Hurringtons disappearance poses a credible threat to his own health and safety. Anyone that has information regarding Hurringtons whereabouts, is asked to call the Harris County Sheriffs at 713-755-7427.