Video of DeAndre Smith, 30, justifying the looting in Ferguson went viral earlier this week. In a less animated interview Wednesday, Aug. 13, 2014, Smith said he wanted to clarify his remarks.
At about 00:26, he licks his lips. That's a signature of lying.
There are also plenty of nonverbal cues to lying, though the authors say that averting eye contact, often thought to signify evasiveness, isn’t one of them, since many of us look away during conversations. More telling: hiding the mouth or eyes, throat-clearing or swallowing, biting or licking the lips, and what the authors call “anchor point movement,” shifting weight and position around the body at rest as a way to reduce anxiety, like fidgeting in a chair.
There are other "tells in the video .. body movement, for example.