Richard John Neuhaus asks good questions in a piece on torture called Speaking About the Unspeakable in the March issue of First Things. He writes:
The assumption held by many, however, is that torture is intrinsically evil and is therefore absolutely wrong. Even moral subjectivists will sometimes argue that torture is absolutely wrong until they realize the logical awkwardness of their position. In any event, causing pain is not intrinsically evil. If it were then the surgeon who performs a painful operation would be malevolent. What makes torture wrong is not the pain it inflicts but rather the motive or reason for inflicting it.
Torture carried out for amusement, for its own sake, or for punishment is a great evil and should be banished from the earth, but torture to save lives is of a different moral order altogether. Just as all killing isn't of the same moral quality, neither is all causing of pain the same. Just as some killing may be morally justified, so, too, may some instances of causing pain. The justification lies in the purpose for the act.
Neuhaus goes on to say that:
The answer to Neuhaus' question, I think, has to be "yes". Not only in cases where thousands of lives are at stake but also in cases where only a single life hangs in the balance. Consider this entirely plausible scenario: A young girl has been kidnapped and imprisoned in a torture chamber or buried alive by her captor who is subsequently caught. He acknowledges that he is the girl's abductor but will not tell police where she is. He will tell them only that she has just a few days of food, air, and water left before she dies. If this were your daughter would you fault the police if they tortured the man to get the information from him needed to save the girl's life? Indeed, if this were your daughter would you refuse to let the police use such methods on her behalf if they came to you and asked for your assent? If so, why? Is the comfort of a child molester and killer more important than saving your daughter's life?
Most of us don't like to ask ourselves such questions. They make us feel too uncomfortable. Yet unless we do ask them our opinions on this subject remain inchoate. We may well find ourselves thrust into a real ticking bomb scenario in the not too distant future. The bomb may be a nuclear device in a major city. We'd be wise to have done some thinking about this issue before that day arrives.