Unfortunately, the only DC Supreme Court naturalization collection at FamilySearch is an index (not papers themselves) of records from 1802-1909 (https://www.familysearch.org/search/catalog/1130697 ).

If it was a military naturalization, you may be able to find it in Ancestry's "Washington D. C., Military Naturalization Petitions, 1918-1924" collection (https://www.ancestry.com/search/collections/3034/ ).  Otherwise, you will need to obtain the naturalization papers through NARA or the USCIS Genealogy Program.

Regards,   -David Oseas  Thousand Oaks, CA  <doseas@...>