Originally Posted by silentC
The way I understand it, he isn't being held as a criminal, he is being held as a prisoner of war. The difference, again as I understand it, is that there is no such thing as a 'trial' for a prisoner of war. They are held in captivity until the end of the conflict and then they must be set free. So, technically, when the 'war' is over, he walks free. No trial, just a handshake and "on your way, son".
I think there is more to this than meets the eye. Why would the yanks care so much about him being a free agent again, what are they trying to hide? Does he know something that he shouldn't?