Well no shit; there's the Geneva convention and shit that makes practices like torture and such illegal. The US can waltz right over that though, because what is anyone going to do?
I understand that some people argue that the Geneva Convention doesn't apply to members of terrorist organizations; that it only applies to members of a sovereign country's military. Regardless, it reflects badly on us.
Torture is wrong; no matter who is doing it or who it is being done to.