How would Bradley Manning say he did it but he is not "guilty"?

I brought up Bradley Manning’s case just an example.
Isn’t there a word that matches “Yes I did it”, and “No, I didn’t do it” instead of “guitly” and “not guilty” plea?
What I mean is, if he wants to send the world, right from the get go, “I regret what I did, it was morally reprehensible thing to do” message, the “guilty” plea would be fine. But if he is claming what he did is a principled, the right thing to do, then his “not guitly” could end up sounding like “it is not me who did it I was framed” or something similar.