What abduction?
Recently we have discovered that the prime suspect for Madeleine's abduction, Brueckner, raped a woman. The crime was not prosecuted by the Portuguese police. It took a German investigation and a German trial to ascertain the facts and get justice for the victim of the torture and rape.
The Germans are now investigating the abduction of Madeleine McCann and it is to be hoped a prosecution will follow when all the other offences against women and children alleged to have been perpetrated by the same offender have been dealt with, not by the Portuguese justice system but by the German justice system.
Rather extraordinary that a Sovereign State appears to be operating in a vacuum of incompetence which renders it incapable of
(a) recognising crimes which have been committed
(b) taking appropriate action to allow citizens and visitors protection from crime and vile perpetrators
The incompetence of the Portuguese investigation in particular as it concerns what appears to be a one-man crime wave perhaps allows you to ask that question.
Fifteen years later or however long it takes, I would recommend you follow the general clean-up of crimes neglected by the Portuguese and taken on as a result by the BKA and German Prosecutors for your answer.
Particularly as Madeleine's abduction was one of those many investigations abandoned by the Portuguese as soon as it was possible for them so to do.