Frances Marion Parker (October 11, 1915 – December 17, 1927) was an American child who was abducted and murdered in Los Angeles, California, in 1927. Her murder was deemed by the Los Angeles Times as "the most horrible crime of the 1920s", and at the time was considered the most horrific crime in the history of California. In later decades, Parker's death was the subject of various murder ballads.
https://en.wikipedia.org/wiki/Murder_of_Marion_Parker