I never knew about this aspect until you'd posted it.
What do you think of the findings via the 2 dogs. As in death in the McCanns apartment and blood etc in their hire car?
The dogs are unreliable. As you probably know the handler and dogs were UK based. After they were used in the MM case they were used in the UK involving another missing child, Shannon Matthews (SM). After she was found alive the police conducted a strategic debrief: Operation Paris. You can find the conclusion re the dogs at page 27 on the pdf and page 25 of the actual doc:
https://library.college.police.uk/docs/npia/Operation-Paris.pdfAs you will see the dogs were alerting all over the place and SM was eventually found alive elsewhere.
They pick up the scent of the deceased even if in close proximity to inanimate items that have been around the deceased. It is known that the partner of the owner of 5A died and the partner of the owner occupier of the apartment above had also died. Both elderly and natural causes I believe.
There is not a scintilla of evidence supporting the McCanns involvement. I am as sure about anything as I can be they were not involved other than their negligence in leaving her alone in an unlocked apartment
