Having read the article the source problem is obvious. A disturbance of the 'attachment' principle. My adoptive older brother fits this mold pretty well. He was adopted (me too) when he was three. He had been determined an abused child and was put up for adoption.
Brain anomalies are a different category in my estimation. Someone with an abnormal brain might be described as psycho but what they really are is brain-damaged individuals exhibiting anti-social behaviors.