“Medical documents were found that indicate an existing disease and appropriate medical treatment,” the statement read.
Investigators also found a torn sick leave note in the co-pilot’s home, indicating “that the deceased had concealed his illness from the employer.”
Medical records of the Germanwings Airbus A320 co-pilot, Andreas Lubitz, suspected of deliberately crashing the aircraft, will be examined by psychology specialists on Friday and then sent to investigators in France, Bild newspaper said.
The German daily reported Friday citing sources and internal documents at Lufthansa, Germanwings' parent company, that Lubitz received psychological treatment six years ago while training at Lufthansa's flying school.
Lubitz was classed as unsuitable for flying but after treatment his characteristics were changed, Bild reported.
The Germanwings Airbus A320 crashed in the French Alps on Tuesday en route from Barcelona to Dusseldorf. All 150 people on board died in the crash.
On Thursday, the public prosecutor of Marseille said that the most plausible explanation behind the crash was that the co-pilot willingly sent the plane into its fatal descent while the pilot was locked out of the cockpit.
Carsten Spohr, the chief executive of Lufthansa, said during a press-conference later on Thursday that Lubitz interrupted his studies as a pilot several times starting from 2008 due to depression.
Lubitz began work with Germanwings after being trained by Lufthansa in Bremen, Germany and Arizona, the United States. He started flying the Airbus A320 aircraft in 2013, and had 630 hours of airtime.