I can't say I have an opinion. Let me explain why.
I've personally seen gruesome images of torture (abu ghraib being a prime torture candidate) and learned about the methods behind torture. What torture works best? Physical pain and life deprivation? Or exploiting your enemies physiological weaknesses like their family or religion to get them to "Crack"? Both have proved to work.
Now, as unpopular as it may be here, I will stand and defend the CIA (Doesn't mean this torture was justified, I'm just not in the mood to read a 500+ page report ATM).
Let me answer a question with a question. If a possible terrorist known to be associated with a group that might have intelligence on an impending ticking dirty bomb in New York City, and just like that you could stop it, and save the lives of millions, would you? Does he have rights, or does the rights of the majority for safety outweigh this individual's right to liberty?
I think it's a thin line, walked every day by Police and Military in different ways. The police is a little more of does this man have drugs, did he just kill a man, or is he going to go home and assault his girlfriend? I'd like to find out, but he has rights too.
I think in many of these cases, it must be judged on a case by case basis. I am all in favor of people's rights to liberty and security, rights and so forth, but sometimes exceptions have to be made.
Sometimes, it's better to be safe than sorry. Which I believe this CIA response was post 9/11.