Detecting high-stakes liars is often the work of the FBI, and they frequently look to facial expressions, body language, and verbal indicators as signals, or "tells," that someone is lying. Mark Bouton, an FBI agent for 30 years and author of "How to Spot Lies Like the FBI," tells.
One technique to detect lies is through the identification of facial micro-expressions, which are brief, involuntary expressions shown on the face of humans when.
The human face is a medium that sends us a message. One part of the medium is its muscle tone. Changes on the human face provide us with.