Conversation so far:
Where did William Henry Dietz go to school?
"Willie" attended Oklahoma's Chilocco Indian Agricultural School, where it is likely he feigned some kind of Indian identity for the first time.
Did anyone find out?
Historian Linda M.
Waggoner has traced Dietz' heritage in several articles in Indian Country Today Media Network and at a 2013 symposium.

Question: Did this affect his ability to stay in school?
Self-contained rewrite: Did the trace of Dietz' heritage affect William Henry Dietz' ability to stay in school?