From le Figaro, French newspaper.
Quelle était la cause de la dépression d'Andreas Lubitz, le copilote allemand de l'A320 de l'avion de Germanwings qui s'est crashé dans les Alpes, fortement soupçonné d'avoir fait plonger volontairement l'avion ? Selon des informations du dossier judicaire allemand, transmises aux enquêteurs français, Andreas Lubitz souffrait d'une déficience visuelle très forte, suceptible de s'aggraver. Une dégradation de la vue qui risquait fort d'obérer son avenir professionnel
Obviously he had an other big health issue to deal with, most likely terminating his career.
Lubitz was obsessed with beeing a pilot, there was nothing else in his live one can read out of the many statements made from people who knew him.
He had many choices to turn things. But he went to work, he locked the door,
he changed the settings, did not opened the door despite his captains efforts and desperate 148 other passengers behind him. He choose to die on a place he loved most, the French Alpes. He learned to fly gliders there. Now he stopped flying at this most scenic place.
From a medical point of view he might not be 'guilty', but also from a medical point he knew bloody well what he was doing. And he somehow must have been a good pretender.