Were those alleged crimes reported to the PJ?
I do wish you would refrain from the use of "alleged" when you know that there is nothing alleged about it. I believe some were and some weren't reported but it was a situation well known to the authorities (Kate was told about it after Madeleine's disappearance) and it should have been a factor in Amaral's strategy instead of the expediency of the one he settled on.
But there certainly appears to be a culture inherent in the psyche of police in Portugal which condones ineptitude and failure to respect the rights of women and children who have suffered serious assault - particularly foreign ones - when it comes to protecting the tourist trade.
I think it might very well come back to bite them.
It was epitomised by Amaral and his shoddy conduct of Madeleine's case. I wonder why it took the Germans to get justice for the American woman who was tortured and raped in Portugal. Or the disgrace of discarding the evidence in the case of the Irish woman whose torture and rape might have proved a link between Madeleine's disappearance or both rape cases.
Portuguese prosecutors DESTROYED vital DNA evidence from brutal five-hour sex attack linked to Christian Brueckner just weeks before Madeleine McCann vanished, court papers revealhttps://www.dailymail.co.uk/news/article-8442487/Portuguese-prosecutors-DESTROYED-vital-DNA-evidence.html