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I came across this tidbit about the song a few years ago:
Sam Bush - The Ballad Of StringBean And Estelle
written by Sam Bush with Verlon Thompson and Guy Clark, the song tells the story of the 1973 murder of David “Stringbean” Akeman, a beloved Grand Ole Opry performer, and his wife, Estelle. The couple was killed during a robbery at their humble cabin north of Nashville.