It's a technique based on a reading of voice patterns after the subject answers a question. If you are not a skilled investigator, then the training will do you no good.

The reasons we move an inmate, and I'll use the Dahmer situation, is that there is a lot of media attention and it stirs a lot of emotion. Wisconsin is a state with a lot of deer hunters, and we have a lot of inmates who are deer hunters, and there are some racial concerns.

After an amount of time, it's not fresh in people's minds.