Dear Ms. Roffol,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Comprehensive Case Files of Former Inmates Incarcerated at U.S. Penitentiary, Alcatraz, California, ca. 3/1975 - ca. 1988 in the Records of the Bureau of Prisons (Record Group 129) that includes a file on SCHIBLINE, ROBERT JAMES - Alcatraz Number 1355. We also located the Former Alcatraz Inmates List that provides further information about the holdings of the National Archives at San Francisco (RW-SB) regarding former inmates of Alcatraz. These records may contain information that is restricted under Freedom of Information Act (5 U.S.C. §552) provisions that protect the privacy of living persons. To request access to these files, please submit a FOIA request to RW-SB via their email address at firstname.lastname@example.org.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of our staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgment as well as a substantive response to your FOIA request from RW-SB. We apologize for this inconvenience and appreciate your understanding and patience. For more information see https://www.archives.gov/coronavirus
We hope this is helpful. Best of luck with your research!