A Silver Alert has been issued for an elderly woman who walked away from her home in Pocola last week and hasn't been seen since. 76-year-old Ruby Poole was reported missing by a family member. She suffers dementia and does not have her medication. She's described as a black woman, 5 feet 7 inches tall and weighing 110 pounds with salt and pepper hair. She was last seen wearing blue jeans and a purple sweater.