(Aloha, OR)  --  Police are asking for the public's help in locating an elderly Washington County man.  Sixty-six-year-old Dane Davis, of Aloha, was reported missing by his caretaker yesterday afternoon after he hadn't been seen or heard from in three days.  Davis has dementia and may not be able to take care of himself.  He is described as black with salt and pepper facial hair and is five-foot-six with a heavy build.  He was last seen wearing a gray hooded sweatshirt and blue jeans.