(Gresham, OR)  --  Gresham police are looking for a 76-year-old man who's been reported missing.  Police say Gary Gochnour [[ GOCK-nower ]], who may suffer from dementia, rented a U-Haul truck in late February and planned to drive to Seattle to live with his sister, but never arrived at his sister's home.  The U-Haul, a ten-foot box truck with Arizona license AE80457, has not been returned.  Gochnour is described as white, five-feet-nine, 165 pounds, with thinning gray hair.