A fugitive ex-cop who authorities say went on the run after allegedly killing his ex-wife and 17-year-old girlfriend in Washington state may have been spotted in Oregon, according to a report Tuesday. A clerk at a Plaid Pantry convenience store on Hayden Island in the Columbia River between Portand, Oregon, and Vancouver, Washington, told Portland police he might have seen Elias Huizar early Tuesday, according to TV station KGW8. The clerk reportedly said the man he saw bought a drink in the store around 12:45 a.m. The man was also traveling with a child in the back seat of his vehicle, descri…