अपनी भाषा में प्लॉट जोड़ेंThe world's leading deception researcher, Dr. Cal Lightman, studies facial expression, body language and tone of voice to determine when a person is lying and why, which helps law enforcemen... सभी पढ़ेंThe world's leading deception researcher, Dr. Cal Lightman, studies facial expression, body language and tone of voice to determine when a person is lying and why, which helps law enforcement and government agencies uncover the truth.The world's leading deception researcher, Dr. Cal Lightman, studies facial expression, body language and tone of voice to determine when a person is lying and why, which helps law enforcement and government agencies uncover the truth.