Sending the dogs in so late after the event and after several other families had used the apartment was a complete waste of time and energy. I wonder did Harrison know that the crime scene was no longer secure and had in effect been compromised when he offered the British cadaver dogs to the PJ?
He didn't know and didn't approve of searches in any of the places where Madeleine had never been.
He disowned UK participation in those searches.
That means the cars should never have been searched.
Harrison's summary of searches:
On 31-07-07 the PJ conducted canine searches with a search warrant at apartments in Praia da Luz that had been previously occupied by the McCanns and their friends.
On 01-08-07 the PJ and GNR assisted by a canine, conducted searches on the eastern beach and wasteland in Praia da Luz.
On 02-08-07 the PJ conducted a search warrant at a villa in Praia da Luz currently occupied by the McCann family.
Later the same day PJ officers conducted a screening procedure involving items removed from the McCann’s villa.
On 03-08-07 PJ and GNR officers were given instruction based on translated extracts from NPIA doctrine on search management and procedures. This focused on search procedures relating to buildings and vehicles.
On 04-08-07 and 05-08-07 a search warrant was executed at the villa and gardens belonging to the PJ suspect Robert Murat. This search involved both PJ and GNR personnel supported by civil defence, geophysical equipment operators and a canine handler.
On 06-08-07 ten vehicles were searched associated to the enquiry.
On 07-08-07 the western beach and remaining wasteland areas were searched using canine and GNR personnel.
On 08-08-07 the drains around the apartment block where Madeleine McCann disappeared from were subject to a visual inspection by PJ officers.
Both inspections at the villa and the gym are described as "PJ exercises".
While Harrison did recommend an inspection of vehicles, he recommended only that cars "owned or driven by Murat" should be inspected, none others.
In the event, a car Murat hired never made the line up, while 8 cars Harrison said nothing about did, including the McCanns' car.
And notice that Harrison waited until
after the inspection at the gym to issue PJ personnel with translated instructions on how to conduct a search ...