Hello Diane. Dr. Rice has done some fascinating studies as has Dr. Hare. In the U.K. and here in the U.S., brain scans and other tests have left the Medical and Legal professions in a quandry. If (and I believe it is)this is a "hardwired" pathology, then where does that leave the responsibility? Defense Attorneys will be able to argue diminished capacity defense, and as treatment actually INCREASES recidivism in psychopaths well, the only Medical answer is "super ego with executive control", in other words permanent lock-up. In fact, this is being considered in the U.K. as we speak. We are talking about something like 2% of the population but in prison we are talking anywhere from 20-30%.