
But we can see in the SM case the transference involved items of furniture.
Also we don't know how the dogs might have reacted had then been entered into Mrs Fenn's who was widowed.
I would expect a scientific approach to have been taken ie enter the dogs into every apartment in say block 5 and then carry out checks on any alerted to by way of history of items and people traffic to determine are the dogs alerting to something relevant to the investigation or odour residue from some innocent explanation.
As the case wanders over block 5, block 4, Casa Liliana and the homes of four other arguidos, what would be your search parameters?
I have reason to believe a car in the family of Sergey Malinka was included in a dog search (July 2014).
Another arguido was living in LuzTur when MBM disappeared. That's the tallest 'block' in Luz by far. Should every apartment inside have been doggie-searched?
Your strategy has to take into account that laws in Portugal do not allow mass random searches on the off-chance, much as per Inglaterra.