the original question are questionable:
--How do we know that torture is the only way to get this person to talk?
--How do we know we have the right person, and that the supposed plot is real?
Many military interrogators say that torture simply doesn't work. People say way you want to hear, and withold as much as they can. Techniques of isolating and befriending the person supposedly work better.
The second question is hardly academic, given the number of innocent people being discovered on death row each year. These people's convictions involved massive judicial processes, with numerous checks and balances designed to ensure that only guilty people end up convicted. If such elaborate processes are unreliable, how do we know that whoever tells us we have the right guy is right? In Afghanistan, we are known to have tortured two entirely innocent people to death (at Bagram, as reported by the New York Times last year). This destroys our credibility as saviors and proponents of human diginity.
In terms of torturing this specific guy, I think many people would say that graded torture would be appropriate if other techniques had failed (including checking his laptop for the location of the other bombs--basic police work is likely far more effective than torture, and free of moral scruples), and we had overwhelming evidence that he was the right guy and that the story of unexploded bombs was true.
Torturing his wife and family, though--to me, that's an entirely different dilemma. I would personally consider it morally repugnant to torture an innocent child, no matter what the potential gain. If torturing an innocent child were the only way to save our civilization, I'd have to wonder if our civilization were worth saving.
Mariner
(...who has been a silent lurker on USMB for a couple of months because liberals are no longer needed to critique Bush & company--they're doing a perfectly satisfactory job of impaling themselves on their own swords and shooting one another in the feet... )