After 23 years as an FBI counterintelligence agent, LaRae Quy can spot a liar. Specially trained in the art of reading individuals and uncovering hidden truths, Quy suggests that you first build rapport and then surprise them. Listen more than you speak and pay close attention to how a person says “no.” A liar may say “no” and look in a different direction or close their eyes. They may say noooooooo stretched over a long period of time or after hesitating.