There also need to be more effective local enforcement and intervention. The bureaucracies are no answer alone. Refer to Vern Geberth and my paper on serial murder in the Journal of Forensics for more info. Indeed, I think that this reflects the differences between Britain and the USA in that serial sexual murder is relatively rare over here but that serial rape is not. We do not have a cohesive society with church and family and school influence.
Kids can do anything and get away with it.
The law needs to be more uniform and tougher. Your reply to an earlier question is very interesting in that you seem to be saying there is a positive role for violent entertainment material. Is there any hope of rehabilitation of the kind of extreme violent and perverse killer that you describe in your biographical work Closely Watched Shadows. This detracts from the need for psychological understanding in early development.