Jared Remy, son of Boston Red Sox broadcaster and former player, Jerry Remy was arrested on Wednesday 15 August 2013 and charged with the murder of his girlfriend and mother of his child, Jennifer Martel. At 0:53 in the above video, Remy can be seen at once exhibiting three different nonverbal signals which involve the jaw.
The first is the Forward Jaw Jut. This involves a temporary forward repositioning of the jaw. This often occurs to the point of an under-bite occurring. It's most commonly (although not exclusively) an indicator of strong anger and it commonly is associated with coexisting hand tension in the form of partial or full fist formation.
When a forward jaw jut is seen with hand tension, there is a high potential for violence.
In this higher magnification but low resolution view of the above image, we can see there is a lateral component as well to Remy's jaw movement. While a Quick Lateral Jaw Movement has another meaning (see cross references below), a prolonged sideways movement of the mandible is a strong indicator of dramatic disagreement. Such disagreement will often be partially or fully verbally suppressed.
This angle also affords us a view of a Backward Head Tilt. This movement amplifies the appearance of a jutting jaw and is a very common head-neck configuration in mug shots and in the newly arrested. In such a context it signifies an emotional tone of determination and belligerence. It can also be an indicator of contempt and arrogance.
In this nearly straight-on view taken a few seconds after the above video, the Prolonged Lateral Jaw Movement can be more easily visualized.
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