99% of military interrogators and terrorism experts will tell you that torture does not work. It almost always leads to the person undergoing torture giving up whatever their captors want to hear.
This one former military interrogator recently said in an interview that in one case where he was interrogating a terrorist suspect, the suspect was EXPECTING to be tortured, and actually gave up information once he realized that they were just going to talk to him. Now, this isn't always the case, but it is an example of how torture can backfire. A book I read about post-9/11 interrogation methods ("The Dark Side" by Jane Meyer) goes into detail about how things like waterboarding failed to produce viable intelligence.
This one former military interrogator recently said in an interview that in one case where he was interrogating a terrorist suspect, the suspect was EXPECTING to be tortured, and actually gave up information once he realized that they were just going to talk to him. Now, this isn't always the case, but it is an example of how torture can backfire. A book I read about post-9/11 interrogation methods ("The Dark Side" by Jane Meyer) goes into detail about how things like waterboarding failed to produce viable intelligence.