The Behaviorist.

Gerard Edling is a well-to-do lecturer, an expert in kinesics (the science of body language) and a former prosecutor with vast experience. Horst Zeiger is a shy young man, an outsider, a computer geek and... a totally unpredictable murderer. When one of them intends to commit a crime, the other, known for being able to decipher any criminal and solve any case, tries to prevent it. Unfortunately, the result of their duel is a macabre spectacle, broadcast online to thousands of viewers...