Conversation so far:
Where was William Henry Dietz from?
According to his birth certificate, William Henry Dietz was born William Henry Dietz, or Willie, on August 17, 1884, in Rice Lake, Wisconsin, at 16 West Humbird Street.
Where did William Henry Dietz attend school?
Willie attended Oklahoma's Chilocco Indian Agricultural School.
In what year did William Henry Dietz go to Oklahoma's Chilocco Indian Agricultural School?
Where did William Henry Dietz live in his early life?
William Henry Dietz lived in Rice Lake, Wisconsin.
Did William Henry Dietz have children?
What was the cause of William Henry Dietz's death?
Are there any other interesting aspects about William Henry Dietz's early life besides where he lived or his school?
After obtaining a coaching position at Purdue University, Purdue officials fired William Henry Dietz for illegal recruiting.

Question: Who had he recruited illegally
Self-contained rewrite: Who had William Henry Dietz recruited illegally?