French Law : many failures in the case already !
In French Law, criminal action is closed against anybody since he is dead ! So no action is possible against Lubitz or against the other crew. But perhaps the prosecutor thinks that the airline is culprit hiring a mental ill pilot, or doctors were culprit to prescribe some medics to a working pilot doing him sleepy or with bad judgment...
With the French Constitution international law (Annex 13 and possible published reserves ) has priority over all national laws and rules...
The prosecutor has no task to inform public and medias. At contrary the "instruction judiciaire" must be kept secret...
BEA investigation and judicial investigation MUST be independent. But Justice has no means nor specialists to do a crash investigation. They have to wait the published BEA report and use it...