 Detectives determined the girl's mother, identified as 33-year-old Brandy Elliott, was responsible for the child's death. Elliott told officers she left her apartment and went to the bottom of the stairwell when her daughter came to join her. The girl reportedly refused to leave Elliott alone and didn't want to stay in the apartment by herself. That's when police say Elliott decided to kill her. Elliott was charged with first-degree murder and is being held in the Sumner County Jail.