I've been following from the beginning, as well as doing some of my own research. IMO this was a well planned out murder and that the perp came to the trail prepared. An organized killer. In fact, he may have been scouting the trail for quite some time waiting for the "right" target. I also believe that his perverse fantasy involved capturing two girls, for reasons such as, but not limited to, getting off on watching one see the other murdered. Of course we do not know the cause of death or how the bodies were found, but it would not surprise me that this psychopath staged the scene in quite a disturbing manner. IMOO the killer lives within a 100 mile radius of Delphi, hides under a veneer of pseudo-normal life. I'd be looking for a person who has been divorced at least once or twice (has difficulty maintaining relationships), with average intelligence, and most likely has an early childhood history of abuse and abandonment...sex for him is about tension relief and management of internal conflict...not about the person, therefore he can treat the victims as objects only.