The tribunals used for putting suspects on trial at Guantanamo Bay are a "stain on America's military", a former military prosecutor has told the BBC in his first interview since resigning.
For Lt Col Darrel Vandeveld, a devout Catholic, the twin responsibilities of religious faith and military duty led to a profound moral crisis. His resignation has led to charges against six inmates being dropped, at least for now, and called into question the possibility of a fair legal process at Guantanamo.