Many moons ago i posted a serious study and American paper on the best modern methods of investigation, especially for cases which were complex and 'stuck.
I can no longer find it on the internet and in all probability it has been wiped from the forum
This long paper, discussed the best methods of searching and the best people to do it. In 'stuck' cases, where all the known facts and leads had been gone over repeatedly, without producing results, It recommended LATRAL THINKING with strict adherence to basic KNOWN FACTS
It also said that Police officers were not trained to do such work; their skills base was different.
This very serious Police paper recommended that Design Engineers had the necessary skills and approach to successfully problem solve certain cases.
And, my first career was as a DESIGN ENGINEER.
You were on Forum at the time, but I doubt you bothered to read it.
Sorry, my dear, but you are out of date with modern thinking on solving the very difficult cases.
From this it seems strictly controlled Creative Investigation is the way forward.
This is all fact so no need to remove bits or splash IMO's all over it
I don’t dispute any of the above but you are pulling your information from unreliable newspaper reports, twice, and sometimes thrice, translated statements and just a smidgen of partisanship. That does not make for a strictly controlled investigation.