Conversation so far:
What happened in William Henry Dietz's personal life?
Dietz divorced De Cora in November 1918, charging her with abandonment. It is not clear how much she knew about his identity.
What happened after people got to know about William Henry Dietz's identity?
Dietz's heritage was first contested in 1916 after former neighbors who settled on the Pacific Coast heard he was posing as an Indian.
Was William Henry Dietz punished or charged for posing as an Indian?
Dietz was tried in Spokane, Washington in June 1919.
What was William Henry Dietz's real heritage?
Indian Country Today Media Network ran a series of articles in 2004 exposing Dietz as a white man.
Are there any other interesting aspects about the William Henry Dietz article?
Dietz's future wife, Winnebago artist Angel De Cora, thought Dietz was a Chilocco student.
Did the couple William Henry Dietz and Angel De Cora get along very well?
Dietz divorced De Cora in November 1918.

Question: Why did they divorce?
Self-contained rewrite: Why did William Henry Dietz and Angel De Cora divorce?