I'm not following you on that, I'm afraid.
Who had a "high position in the PJ"? Amaral? He was the coordinator of a local police force prior to leaving it.
What are you saying? That individuals within a country's law enforcement should not be held to account?
Amaral was in charge of a police force, albeit a small, local one. It was a position of some authority.
I'm not saying that people shouldn't be held to account. Not at all. I'm just saying that a certain realism is required with regard to how far a court can go in serving people's every need. A court is not the place for any and every kind of emotional damage or social injustice to be dealt with. Maybe it should be, but it is not. There are loyalties, prejudices involved which can skew any case even before it starts.
The McCanns are taking their grievances to the court of a foreign country, with the additional linguistic and cultural obstacles that entails, and where they have a very bad public profile to boot. They are expecting a lot if they demand sympathy and justice, not to mention a lot of money.
There are many examples of injustices and grievances that people have expected courts to be able to handle, perhaps rightly. But examining a lot of these cases, it is often the case that the litigants constructed their case expecting the court to address all of their problems. Hence, things went awry. One has to be realistic about what it is that the court can actually do in a particular situation, and construct one's case accordingly.
The McCann's arguments, while reasonable at certain levels, are also a bit vague and emotion-based.
With these emotional cases, there are sometimes better forums than the court which entail a great deal less taxpayer's money and personal risk. One has to know what belongs in a court and what does not.