(Portland, OR)  --  Police say they are looking for a Gresham man with dementia who went missing Saturday.  They say 62-year-old Vernon Sellars was last seen around 7:20 a.m. and was wearing a baseball cap, green jacket and khaki pants.  Police describe Sellars as a white male who is five-feet-nine-inches tall and is 195-pounds.  Anyone with information about his whereabouts is asked to call police.