"Some experts have estimated that as much as 93 percent of communication is ‘non-verbal'. Certain eye, hand and body gestures might ‘leak’ an individual’s true knowledge, thoughts or emotions. Specific physical signs might betray their spoken words. An eye blink, an inappropriate smile, the folding of one’s arms or the rapid bouncing of both legs while sitting, all might be significant in determining the truth if observed at an inappropriate moment."
Rickey Fernandez offers seminars on interview and interrogation training utilizing the “body language” technique. He incorporates physical gestures, verbal cues, and their implications in attempting to surface deceit in an interview or interrogation situation.