''Anything pertaining to that would have to be gleaned by the relevant professionals.''
It has been gleaned by the relevant professionals. DNA evidence on Alesha's body was was found and analysed by the relevant professionals. This evidence incriminated AC. CCTV evidence from around the garden and home of the guilty party was analysed by the relevant professionals. CCTV evidence from other properties along the shoreline was analysed by the relevant professionals. Palm prints from AC's right hand were found in the stairwell leading up to the flat from which she was abducted, also analysed by the relevant professionals.
The evidence was tried in court; both very publicly and very visibly in the media thanks to the advent of Twitter and live news updates etc. AC was defended by a QC, who even among Advocates, is considered to be at the pinnacle of his profession. This wasn't some public defender that AC had, he was given a very competent defence by one of the foremost lawyers in Scotland. The prosecution case was brought by Iain McSporran QC, who again, is regarded highly even among Advocates. Are these men not relevant professionals? The idea that this was a fix, or that somehow there is an institutional cover-up on the part of the Scottish Legal system is ridiculous quite frankly. It stands up to zero scrutiny.
AC admitted his guilt, and went into very explicit detail as to the nature of his crime, to both the Consultant Forensic Clinical Psychologist Dr. Gary MacPherson and to social workers. Dr. MacPherson is also the lead Clinical Psychologist at the State Hospital Carstairs and has a wealth of experience in interviewing those convicted of crimes, and those who may be criminally insane.
The conclusion of the work of all these 'relevant professionals' resulted in the conviction of AC, and eventually the admittance to these horrific crimes by AC. This admittance was accepted and regarded as truthful by the relevant professionals.
This is as cut and dry a case as you will ever see in a Scottish Court. The conviction is clearly safe. To cast aspersions on this conviction is to be either deliberately obtuse or willfully peddling conspiracy theories. Unfortunately I think you are veering towards the latter.