Nothing apart from a clear absence of any evidence that they HAD been thoroughly investigated! You logic is getting loopier by the minute.
The only 'trick' of which I am aware of featuring Paiva was the one when he used work equipment to display his equipment to an internet acquaintance in the mistaken belief he was a she and a busty, blonde model into the bargain.
What a plonker!
Not sure, but I think the repercussions of that episode was banishment to Madeira?
The repercussions from sitting on files of evidence possibly consisted of suffering from repetitive strain injury from writing "not relevant to the enquiry" on everything received; and the instruction from the trial judge that his secret collection be handed to the McCann lawyers to enable them to see what evidence he had accrued and ignored.
Actually I don't think Paiva was ever the sharpest knife in the box. Apparently he incriminated himself when defending against the suggestion Amaral's book had damaged the search for Madeleine.
He attested that information continued to come in and he had assiduously filed it in boxes marked "not relevant".
Sharp intake of breath from everyone in the court!!!!