Dear Ms. Oldham,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Population Schedules for the 1940 Census in the Records of the Bureau of the Census (Record Group29). See the digitized image 17 for a Jimmie S. Wilson, his wife Mary, son George & his 4 siblings. The family members are listed as Indian (Native American) but without any specific tribe affiliation.
You may wish to review NARA’s website BIA Records: Oklahoma for more information. Also, we suggest that you contact Oklahoma Vital Records for birth certificates and the Missouri Department of Health and Senior Services for his death certificate.