Olive.... there were/are studies on all these criminals.... its not a disease which can be diagnosed and cured or can give some vaccine to prevent it...

Human mind is a subject which psychologist are trying to study for ages...maybe their causes can be analyzed but a solution is not possible unless and until he does the crime ...how do we know he is criminal?? So eradicating it is not practical….

So all the crimes should be given the maximum and humiliating punishment….and this monster deserves nothing less than death sentence.