(Portland,. OR) -- Authorities in Washington County say the remains found inside a car that was discovered in the Willamette River last Friday are those of former Cornelius Mayor Ralph Brown. Investigators say there were no signs of foul play. Brown -- who was 77 -- had been missing for a year. Brown was last seen leaving his home last May 16th. His family says he had been diagnosed with Alzheimer's a year before he disappeared.