Good point sociopathic behaviour stems often from a lack of empathy given to you as a child. The child then becomes detached, cold & unfeeling. They don't experience the range of emotions we do and frequently "act" what are normal feelings for us. They lack a moral compass and have no guilt for hurting others. Hence, it would seem to fit that given people aren't born evil (or with sociopathic traits) they are deprived of empathy from primary caregivers. In GBC case it might be expected that if he was not shown that level of empathy as a child from his family then it is quite possible their judgement, empathy & moral value system is decidedly different to most other people making them potentially capable of colluding with GBC. GBC seemed arrogant when I met him and a little self-absorbed. I believe senior BC has an element of that also.