How many now ruled out now? they'll get back to where the PJ were at the archiving eventually one supposes, just by a huge diversion.
In my opinion your post shows a great deal of disrespect for the officers assigned to the missing person inquiry with Madeleine McCann as its focus.
According to this link the police have investigated and ruled out more than six hundred individuals including the four of apparent current fora angst.
Quote
Mr Rowley insisted the investigation has achieved "an awful lot".
He said: "I think people get seduced perhaps by what they see in TV dramas where the most complex cases are solved in 30 minutes or 60 minutes.
What we started with here was something extraordinary.
"We've achieved a complete understanding of it all.
We've sifted out many of the potential suspects, many of the people of interest and where we are today is with a much smaller team focused on a small number of remaining critical lines of inquiry that we think are significant."
http://www.aol.co.uk/news/2017/04/25/madeleine-hunt-police-pursuing-significant-line-of-inquiry-10/As far as I am concerned that is definite progress as far as the investigation and Madeleine are concerned.
Better by far than her case sitting ignored in a Portuguese archive over the past ten years don't you think? Which is precisely where it would still be without "the flawed tunnel vision" of the police force tasked with finding Madeleine McCann.
Worth a reminder here that Scotland Yard are hand in glove with the current Policia Judiciaria in this endeavour.