INTERROGATORS GET A sophisticated set of tools to use when they question prisoners. When asked what interrogation is, Greg often describes it as nothing more than extreme interpersonal skills. This set of tools is finite, and the process of putting them to work is describable. Using them will not catch most people off guard; it will go unnoticed because most people have no knowledge of them.The tools you need fall into five categories:QuestioningPsychological levers or approachesBody language/baseliningProbingActive listeningQuestioningYou might think of questions like a leash on a dog. In some cases, the leash gently links a man and a dog; the leash suggests to the dog where to go. In other cases, it gives the man a way to pull the dog in the direction he wants. In another case, the man who doesn't know what he's doing gets pulled by the dog.We sort questions into specific categories: direct, control, repeat, leading, compound, canned, negative, and vague. At some point, all of them will be useful to you.Good questions are easy to understand and use basic interrogatives: who, what, when, where, why, how, what else—and when all else fails, “huh?” Good questions allow the person to answer in a narrative so you can gather information. When your purpose is to corral a conversation, a leading, vague, or compound question may be of more use. Questions can be used as steering mechanisms to direct your target to a point where you can apply a psychological approach.Direct QuestionsJust ask what you want to know—a good question allows the person to answer in a narrative format. Most questions you ask will be direct. The longer the answer, the more options you have to pick up your next question from the information deposited in the answer. That is, you follow the lead.Control QuestionsControl questions are questions to which you know the answer. In the intelligencebusiness, these questions are used to establish whether or not the person is telling the truth. Asking “Where were you on Tuesday?” if you know the answer alerts you to whether the source will lie to you, or to see what his body language looks like when he responds truthfully. The use of control questions is limitless. A skilled questioner will use them to redirect conversation or apply pressure to the source to create stress and verify veracity.Repeat QuestionsSimply restating or stating the same question in another way is a repeat question. Repeat questions are another way to verify whether the source is lying. If she gives you different answers each time, she is lying. A sophisticated version of this tool slices the question into pieces, which gets at different nuances of the answer, and then consolidates the multiple answers to get the whole picture.Leading QuestionsLeading questions telegraph what you want to hear. To be good at getting people to give you information, you need to spur them into conversation first; leading questions can serve that purpose. Maneuvering someone into a position that allows you to successfully use a psychological lever often requires luring him or her down a conversational path. Leading questions are most beneficial in setting up the follow-up question; they result in a yes or no answer. Many involve the verb to be, as in this leading question posed by Dan Rather to Saddam Hussein: “Mr. President, do you expect to be attacked by an American-led invasion?”12 Unless you are deliberately trying to lead your target, beginning a question with “will you,” “did you,” or “are you” indicates you need to restructure your question. Leading questions have value in establishing control in a conversation because they are structured to help you slip past a logic point that someone might have an issue with.