Understandable. That's beside the point when it comes to the wheels of justice, though. They have to turn correctly at all times for any of us to be able to condemn him, otherwise we aren't any better than him. Therefore, it was money that needed to be spent and was for the general public as well as him, to prevent your and my rights being trampled upon.
The least deserving have to be given full rights and access to all legal rights, otherwise we open the door to a subjective justice system that can deem you to be unndeserving at any time.
That's part of the complaint about gitmo - it deemed some people not deserving of rights, and a lot of those people left without ever being charged which just shows up how flawed and abusive that idea was, I think.