Right you are, this is an enormous mistake, and this will be a gamo of political ping-pong through the courts for some time. This is a preview of what it will be like to try and dismantle Guantanamo.
In any case, you always want to leave one survivor alive, to go home and tell his story to the others...
I’m not even sure we can prove the guy committed a crime... Then there is the ACLU, NAACP and other fun organizations to come his defense.