Serial Killers: Biological Pedis positions.

Some individuals show a biological predisposition to violence due to deficits of the brain system which involve a low level of frustration tolerance. In the volatile brain structure, stress events and environmental traumas are added.

He prefers to retreat into a private world of fantasies which satisfy him. After having committed the murder, the killer is ready to start the destructive cycle and become a serial killer. He chooses the victim and after the murder spends a period of relative calm in which he elaborates and relievs the murder he has just committed in his fantasy, until, once more.