The Germanwings co-pilot who crashed the Germanwings plane that was carrying 150 people on Tuesday was dealing with some mental issues.
Investigators are saying Co-Pilot , Andreas Lubitz hid his illness from his employers.
In a news conference on Friday, the prosecutors said that Andreas Lubitz hid a sick note on the day the Airbus A320 crashed into a mountainside during a flight from Barcelona to Dusseldorf.
Investigators found the note, dated on the day of the crash on Tuesday during searches of the 27-year-old’s flat in Dusseldorf.
The prosecutors added that documents showed he was receiving medical treatment, but that no suicide note or claim of responsibility for the crash was found.
They said: “Documents with medical contents were confiscated that point towards an existing illness and corresponding treatment by doctors.
Lubitz has been accused of deliberately flying the aircraft into a mountainside shortly after preventing the captain from re-entering the cockpit.
All 150 on board the aircraft died in the crash.
German media has reported that Lubitz received treatment for a severe depression six years ago during his training to become a pilot.
