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Denied status as a conscientious objector, Kays fled to Canada to avoid getting drafted for military service in Vietnam until the US Army guaranteed he would be able to serve as a medic.
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Kays left the Army while still a private first class. He spent time in mental hospitals and struggled with addiction.
He took his own life at age 42 and was buried in Maple Hill Cemetery, Fairfield, Illinois. Mills published a book, Troubled Hero: A Medal of Honor, Vietnam, and the War at Home, detailing Kays's life in Fairfield, Illinois through the Vietnam War.
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