Authorities in Benton County are asking for volunteers as they continue to search for an elderly woman that has been missing for 12 days. The Benton County Sheriff’s Department is asking for volunteers to meet Thursday morning at 9 at Highway 7 and Cold Springs Road. 77-year old Hellen Cook was last seen on Saturday, July 13. She is described as a white female, five feet tall, 97 pounds with brown hair and blue eyes. She was last seen wearing a white t-shirt, blue jean shorts and tennis shoes. Authorities say Cook does suffer from Alzheimer’s. Cook may be trying to get to either Buckner or Blue Springs. Anyone with information is asked to call 9-1-1, your local law enforcement agency or the Benton County Sheriff’s Department.