9/23 UPDATE: CT has obtained a second letter from an SPLA official denying that Childers works with them. "Sam Childers is not associated with the SPLA," Lt. Gen. Kuol Deim Kuol said in a statement. "The SPLA does not know Sam Childers."
With additional reporting by Uma Julius and Esther Nakkazi in South Sudan.
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Childers's book, Another Man's War, is available from ChristianBook.com and other book retailers.