Ok lets run with JC the suspect, SL vanished with out a trace, fast forward to 87, JC abducted and murdered SB , he kept her car, he had the tax disc, now after allegedly abducting and killing SL with out a trace, he perfected the crime ,his next victim he made many a mistake one a perfect crime the other he was caught for, just doesn't add up imo . The victim leaves traces, go back to the Red Sierra I gave a link for in the previous thread, its alleged both SL and JC's dna were in that car , is that a myth ?
Objectivity is absent...and objectivity is required to do this justice.
I refer you the disappearance of Genette Tate, 13 years old, whilst delivering newspapers on her bike, in 1978. Her bike and newspapers were found in the road. No trace of her body or clothing has ever been found.
Devon and Cornwall Police carried out a review in 2014 and were preparing a file for the CPS for a decision to charge the child serial killer Robert Black with Jenette's murder. Black died in 2016 before the decision was made and the CPS would not assess the charging decision posthumously.
Genette would have been Black's first known victim, had he been charged and convicted. In which case he disposed of her in a way that she wouldn't be found.
Black's subsequent known victims were all deposited where they were found, which greatly assisted the evidential trail. Black was arrested when he was seen to abduct a young girl and drive out of the village only to turn around and drive back through the village as the witness was speaking to police at the scene!
N.B. The abducted girl was THE police officers daughter. He rescued his own daughter.....AND kept his cool!
Killers got lucky, particularly in the days before CCTV, ANPR, DNA and telecoms data, social media etc.
Killers also get more confident and their arrogance means they make mistakes.
JC thinks he the dogs....he's a bit thick really but he can't see it because he's a narcissist.
With SJL, I firmly believe that JC knew her and that he was looking to develop an 'acquaintance' further. He had conned her about who he was and what he was. She was drawn in by the apparent wealth initially but then sought to extinguish his interest in her.
With SJL he had a plan, he was on the charm offensive. He was able to persuade her to go voluntarily to a place where he made a move....she rejected him....his rage was as is well documented.
Because of JC being able to strike at an enclosed location and at a time of his choosing, he had less chance of being caught and had time on his side to dispose of her properly and clean up, not leave silly clues such as clothing, keys, sale particulars etc, combined with a fear of getting caught and not having the confidence of having killed before and got away with it.
Your argument has not considered any of these factors and these are very much the norm for most serial killers. They invariably get caught eventually, because their narcissism, over-confidence and arrogance makes them sloppy.
There will always be those who are pure psychopaths, think Bundy......who have no fear and are highly intelligent. They think clearly and logically in the most challenging of situations. They are not prone to making lazy mistakes.