I think another song that referred to prison was “My Boyfriend’s Back.” (Probably back from a juvenile prison.)
Hmmmm--never thought of that. I had always assumed the boyfriend was on vacation, had relocated to pursue a career, or was sitting east of the Rhine holding an M-14 and keeping an eye out for Russkies.
In any case, here's the answer song:
Your Boyfriend's Back--Bobby Comstock & the Counts (1963)