(Portland, OR)  --  Police are investigating the death of a Portland man who had been reported missing.  The body of 70-year-old John Lloyd Scott, who suffered from Alzheimer's disease, was found yesterday morning near Johnson Creek in Southeast Portland.  Scott was dropped off Monday afternoon by family members at a MAX platform, where he was to catch a train to Clackamas Town Center, but called family late that night to say he was lost "near the bike trail."  A search-and-rescue dog found Scott's body.