Temple PD locates missing elderly man who suffers from dementia TPD and last updated 2021-04-13 13:32:49-04 TEMPLE, TX â UPDATE: ORIGINAL STORY: The Temple Police Department is seeking the publicâs assistance in locating a missing 78-year-old man who suffers from dementia. Don Johnston was last seen on April 11, 2021, according to police. He is believed to be driving a dark gray 2004 Dodge Dakota crew cab with TX License Plate number LRF-7643. Anyone with information is asked to call TPD at (254) 298-5500. Copyright 2021 Scripps Media, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.