Dear Mr. Ferguson,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located a series titled Straight Numerical Files, 1904-1974 in the General Records of the Department of Justice (Record Group 60) that should include File #170268 in Box 1632. For access to and/or a copy of the file, please contact the National Archives at College Park - Textual Reference (RDT2) via email at firstname.lastname@example.org.
We hope this is helpful. Best of luck with your family research!