The father of Andreas Lubitz, the Germanwings co-pilot who deliberately crashed his aircraft killing 150 people, on Friday claimed his son was not responsible for the disaster.

An emotional Günther Lubitz told a press conference in Berlin his son was not depressed or suicidal at the time of the 2015 tragedy, as is widely believed.

But he failed to produce the evidence he had promised that would clear his son’s name.