Without having a full history of Martin Grime's employment record after his stint in Praia da Luz and Jersey it is a very difficult remit for members to go anywhere near the demands of the thread title.
In fact I think the collective informed knowledge of members along the lines required to stay on topic has proved to be exceedingly limited
So as usual your opinion is spot on.
As far as I know, Martin Grime's accreditation for training and working dogs is for life and one can only imagine his expertise will only increase the longer he continues.
I think the problem arising from the inspections in Praia da Luz was the misinterpretation and misplaced emphasis placed on the dog alerts before they had been verified by forensics.
That was not entirely the fault of the handler and his dogs. In my opinion having been used to working with police who understood the concept the handler underestimated the lack of understanding of most of the Portuguese investigators. Thus the combination of impatience in waiting for results from forensics and desperation to make an arrest proved a toxic mix which had disastrous consequences.
It is probably highly unusual for so much of an investigation to hinge on the results of the interim and unverified work of a dog team. One seldom hears of the working 'failures' and 'successes' of such in court ... only the resultant evidence is produced.
Perhaps, apart from American cases where Martin Grime has appeared as an expert witness, that is why we know so little of his subsequent working life post Praia da Luz which may have very well been an aberration in normal working practices.