Dilema - The Bad Bomber

Last week, we talked about the bad bomber.
I disagree with torturing him because he is mad, and it is not sure that the mad bomber will confess where he has planted the bombs or how to stop exploding. Also, I disagree with torturing his innocent wife. Even if he can't stand to see his wife being tortured and it makes him talk, what he says might be untrue. Furthermore, the bombs are going to go off in a short time and maybe the police can not stop it, and it is easy for the bad bomber to gain time if his purpose is to explode the bombs. So, I think it will not work to torture the bomber and his innocent wife.
In stead of torturing them, I think they should negotiate with him. For example, if he confess what the police wants to know, his punishment will be reduced. On the other hand, there will be some counters. I guess some arguments against my opinion. First, It is not good to reduce his punishment. Maybe it is not good to negotiate with a criminal. However, if they can stop the bombs, many people will be safe and he will not kill any people. Then, his punishment should be lighter.
But, there is the most difficult problem; his purpose is to explode the bombs and if he doesn't want to reduce his punishment, no way will work. Also, he is mad and he may not understand what police do. In such a case, we can not do anything.