Betty was last seen at her apartment in Sullivan, MO. She was in the beginning stages of dementia. Alexander is considered an endangered missing adult, and the date of last contact with her was reportedly on April 10, 2019. She was 69 years old at the time of her disappearance (born on October 22, 1949). She is a white female with brown hair and blue eyes, standing 4’11” tall and weighing 150 pounds. At the time of her disappearance, she had blonde highlights in her hair.