Which makes me think Johnny Cash sang the song, but Google can't find such a song at all.
You mean a "Boy Named Sue" by Johnny Cash, number One Billboard Hit 1969?
No, this was a later song, about a guy being mistaken for a skyjacker. But the "Sue" part was an obvious nod to the Johnny Cash song, and I fully expected my search to show that Johnny Cash had done both songs.
Perhaps is was an obscure local song.