The Little Girl was one of the purported murder victims at the Mansfield Training School (or the House of Imbeciles). Her last known whereabouts were in the house of the superintendent of the asylum. There is not much information on why she was staying at the superintendent's house. Possibilities include her having a disability herself or that she was brought there to stay while one or both of her parents were being "treated" in the asylum. She was abused in the house and was eventually killed while washing her hands in the basement bathroom.
While investigating the basement, a concrete structure was found which allegedly contained cremated human remains. It is possible that these remains include those of the Little Girl, and possibly one or more victims of abuse in the house.