So, police DO change the course in an investigation from missing when dogs are brought in, silly UK police hey? Its only the Portuguese who are supposed to do that!
He was questioned as a witness in a missing person case, a status that changed when sniffer dogs indicated that a body had been in Pacteau’s car. DNA samples taken from his apartment showed traces of Ms Buckley’s blood.
http://www.breakingnews.ie/ireland/he-robbed-us-of-our-beautiful-daughter-and-sister-buckley-family-issue-statement-690536.html
He was a fantasist who discussed means of disposing of a body.
His image was captured on CCTV in the company of his victim.
He had been acquitted on a rape charge which was alleged to have occurred a short distance from where he battered his victim to death in his car with a spanner.
Traces of his victim were found in his flat where he had changed his mattress after enquiring how to remove blood from his old one.
He purchased caustic soda which he made into a solution in a drum and attempted to dissolve his victim's body in it.
He was familiar with the storage facilities on the farm where he had stored the drum and its contents having rented there before.
Forensic tests on the dirt trapped in the wheel treads of his vehicle showed matches for the soil from the farm where he dumped his victim's remains and from where he dumped her handbag.
That's all I can recall off the top of my head, I'm sure there will be more.
The example you have chosen to equate the value of police dog working bears absolutely no comparison or relation to what happened in Praia da Luz ... it is rather mean spirited of you to suggest such a thing.