Spencer confessed to her murder , then told police that he had killed 13 other people over the years .
Henry Spencer was arrested by Chicago police for the murder of Mrs. Mildred Rexroat nine days earlier .
Henry Spencer confessed to her murder , then told police that Henry Spencer had killed 13 other people over the years .
Henry Spencer was arrested by Chicago police for the murder of Mrs. Mildred Rexroat nine days earlier .