I've been watching a show on television called "Mind control" and it has a brit (Derren Brown) who is able to tell a great deal about people and whether they are lying simply by observing them and listening to them. Whatever he knows should be taught and learned by interogators. He is absolutely amazing and I believe he is legitimate as he tells you how to do some of what he does as well. Let's use psychology and science to get the best interogators and never torture anyone ever again.