As this was said by AR at the same time as the appeal about the monster who sexually assaulted 12 girls was made - then IMO it is far more likely that there is something in that person's modus operandi which has emerged after interviewing the families which has led them to believe that Madeleine may have been killed - maybe even accidentally by that man - and the McCanns do not come into it - and possibly - neither do the dogs -whose alerts could be completely unrelated.
In their eagerness to believe SY are about to put the McCanns in the frame - that particular monster seems to have been eliminated from the equation altogether by some people.
As the investigation progresses things will change as people are ruled in and out of the inquiry resulting in changes of emphasis and direction.
What won’t have changed is the initial information which caused NSY to rule Madeleine’s parents out, and that includes the dog alerts in 5a and elsewhere.
The focus of the investigation is now firmly directed elsewhere and I for one will be astounded if it includes the parents, although nothing can be ruled out.
I think Benice has hit the nail on the head when she says something may have been discovered about the perpetrator of the attacks on British children which has caused the concern to be raised that Madeleine may have died in the apartment.