Because, gosh, there just isn't any evidence. We're looking forward, not back.
The CIA tortured terror suspects in its programme of "enhanced interrogation", the agency's former executive director, Buzzy Krongard, has admitted to the BBC's Panorama programme.
I asked Buzzy Krongard, the CIA's former executive director, if he thought waterboarding and painful stress positions were torture:
"Well, let's put it this way, it is meant to make him as uncomfortable as possible. So I assume for, without getting into semantics, that's torture. I'm comfortable with saying that," he explained.
Also, a familiar voice quoted here.