From the archiving report:
"The investigators are well aware of the fact that their work is not exempt of imperfection; they have worked with an enormous error margin, and what they have achieved is very little in terms of conclusive results, especially concerning the fate of the unfortunate child. Nevertheless, they always knew that action was necessary and in reality they acted intensively and with commitment, even at the risk of erring.
Nevertheless, anyone who feels unsatisfied about the epilogue of the investigations, will have the possibility to react against it, having the possibility of eventually changing that epilogue, by prompting diligences based on new evidence, as long as that person has the legitimacy to request them and the requested diligences are serious, pertinent and consequent. They may do so in three ways: by requesting the reopening of the inquiry, under article 279, number 1 of the Penal Process Code; by appealing hierarchically against this dispatch under number 2 of article 278, or in another case, under number 2 of article 279 of the Penal Process Code, or by requesting the opening of the instruction under article 287, number 1, item b, of the Penal Process Code.
Finally, it should be noted that an archiving decision may be a fair decision, although of the possible justice, and, especially, to underline heavily that the archiving of the present files does not equal a definite and irreversible closing of the process. This process, as long as the prescription deadline for the possibly committed crimes does reach its term, and if new evidence that justifies it, appears, can always be reopened, officiously or through the request of an assistant, again ordinate to a final decision of accusation or non accusation."
http://www.mccannpjfiles.co.uk/PJ/LEGAL_SUMMARY.htm