Say I am a structural engineer designing a simple structure; a topic of which you have no knowledge.
You ask me how I go about it and I am happy to explain. You then tell me one of the sections is too small "in your opinion". What is your opinion worth under those circumstances, having about 60 minutes previously not known gee from haw on the subject? Ask searching questions yes, but presumption on the basis of being able to use Google is a bit fatuous.
It is not opinion, but fact, that dogs attending a crime-scene and picking stuff up in their mouths and trampling all over stuff they are tasked to inspect is rank bad practise.
It is not opinion, but fact, that inspecting clothing in common circulation as clothing is for fully 3 months after the crime was never going to yield clues about what happened to Madeleine. Especially twice.
It is not opinion, but fact, that inspection in places Madeleine never lived in or went near was never going to reveal clues about what happened to her (and didn't!)
It is not opinion but fact (confirmed by Grime in his rogatory interview) that cross-contamination of a death scent is immediate.
So while packing stuff into cardboard boxes for transportation would (ordinarily) be bad practise, in this instance, it didn't matter, because cross-contamination would long ago already have occurred.
The whole thing was a pile of crock.
Harrison went as far as he dared in his reports in indicating that ....