As an investigators we are often asked to interview a witness to obtain information and to determine the credibility of the witness in the event a case goes to court. Time and time again I have to talk and talk and talk to get a witness to relax and open up. Once they start to talk it is my job to hear every word they say. What they say can make or break a case but sometimes it is what a witness does not say that can be even more helpful.
Reading between the lines, listening to the long pauses and figuring out what the answer really means that can be the most important part of an interview. Many times you ask a question but the witness gives you a answer that is not really an answer. So listening to what a witness does not say is critical in determining if a witness will be credible.
Private investigators need to have a keen ability to read people.