Dear Ms. Hall,
Thank you for posting your request on History Hub!
The location of any surviving records concerning a prisoner in the 1920s will depend on which jurisdiction was responsible for his or her imprisonment. The National Archives and Records Administration has custody of some records concerning inmates at federal penitentiaries in the Records of the Bureau of Prisons (Record Group 129). For additional information about these records, please review Prison Records at the National Archives. Records about persons tried for Federal crimes also may be located in Federal court records in the custody of the National Archives.
Records regarding inmates at state penitentiaries are typically held by the archives of the state in which they were a prisoner. In some states, records regarding persons held in county or city jails might be with the records of the county court or in the county or municipal archives.
Death certificates are created and maintained by the state or territorial government where a person passed away. The National Center for Health Statistics provides a list with links to the vital records departments of US states and territories.
We hope this information is helpful. Best of luck with your research!