From what he says here I think it is irrefutable that Martin Grime was under the impression that the crime scene had been locked down after Madeleine's disappearance.
I doubt he would have used that description of scent pooling had he known that business as usual had been allowed and that various families had occupied it since Madeleine went missing. Ruling out Grime's appraisal of the hot climate in combination with the closed down apartment would allow the scent to remain undisturbed ... hence the dog alert.
It is an entirely different scenario from families living daily in the apartment. Coming and going ~ opening doors ~ opening windows ~ cooking ~ eating takeaways ~ cleaning schedules while occupied and deep clean schedules between occupations.
Making it impossible to determine what exactly it was that excited the excitable dog into barking.
Snip
The blunder was revealed in the extensive 30,000 page police dossier into the investigation.
Details of all those who stayed in 5A after the McCanns were disclosed in an internal document written by Chief Inspector Vitor Matos to Goncalo Amaral, who was then leading the investigation.
- After the disappearance apartment 5 A was occupied by the following individuals: 12-06-2007 - 19-06-2007 by R and F. F****** (friends of the owners), from 28-06-2007 - 12-07-2007 by SR, W & CF, 12-07-2007 to 19-07-2007 by BSP and JFP, 19-07-2007 - 26-07-07 by MMS family.
https://www.mccannpjfiles.co.uk/PJ/DCCB_LETTER.htm
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On June 12, a couple from Liverpool who were friends of the owner, retired teacher Ruth McCann - who is no relation to Kate and Gerry McCann - stayed in 5A for a week.
A family of four from Falkirk in Scotland stayed from June 28 to July 12, followed by a couple from New Barnet in Hertfordshire.
On July 19, a family of three from Leicester stayed for a week.
https://www.telegraph.co.uk/news/newstopics/madeleinemccann/2523523/Madeleine-McCann-Apartment-was-not-made-crime-scene-for-two-months.html
It is highly probable that Martin Grime had no idea of these occupancies since it seems the McCanns were made arguidos prior to the judicial police locating evidence which justified it as the dates from the files would indicate.
I disagree with your first premise. You would need to check with Mr Grime if he thought that to be the case. And whether or not he would have claimed scent pooling under both options.
Personally, I cannot fathom why scent pooling should not have occurred at any time, from before Madeleine's disappearance until Grime's search.
Without that, your post is pure speculation.
There is nothing in the video to suggest to Grime that 5A was sealed off. I am not aware of a case in the UK where a scene of disappearance gets sealed off for that length of time. If you have an example, please enlighten me.
The scene was forensically searched by 3 PJ teams over the 3rd and 4th of May. When it was returned to the owner there was no reason to think a search by English dogs would be conducted some months later.
I can see no reason why Mr Grime should think the apartment had been sealed off.
I have a number of questions for Mr Grime. If you have a contact method for him, please enlighten me.
After all, if I don't ask, I am unlikely to get answers.