During the years that followed, the families of
Minerve's crew made a concerted effort to find out what had happened. The French Navy did not release any information on the possible causes of the sinking. The file was classified as , which meant that it would not be publicly accessible for 50 years. After having requested access to the files many times, and having been refused each time, Christophe Agnus, who was the son of
Minerve officer Lieutenant Jean-Marie Agnus, obtained an exemption to consult the archives in 2007 at the invitation of
Nicolas Sarkozy. Agnus discovered nothing; other families were also granted exemptions, but came to suspect the Navy of concealing evidence that compromised its position. In 2018, Hervé Fauve, son of
Minerve captain André Fauve, appealed to French President
Emmanuel Macron to withdraw the
Secret Défense status on the
Minerve file ahead of schedule. The file had been in the state archives since 1977, and it would not ordinarily have been declassified until 50 years after the date of the last item to be added to the file, which was 1970; thus, the file would not ordinarily have been declassified until 2020. However, there was a risk that the file's secrecy would be automatically renewed on the scheduled date of declassification, and would extend the duration of its classified status until at least 2030. Fauve argued that the file was 'empty' according to those who had consulted it, that no similar submarine was still in use, that the file contained nothing that might endanger the security of the state, and above all that the families of the
Minerve officers lived in hope of seeing the declassification of the file. The French government examined Fauve's request, and the
Official Journal of 16 June 2018 announced the declassification of the archival material on the disappearance of the
Minerve. == Relaunch of the search for the wreck ==