article_snippet: The captain of the ill-fated flight - named by local media as German father-of-two Patrick Sonderheimer - left the cockpit but found himself locked out when himself tried to re-enter (file photo) 'Deliberate': Marseille prosecutor Brice Robin said Lubitz used the flight managing system to put the plane into a descent, something that can only be done manually .
article_snippet: Mr Lubitz - whose family were at the scene of the crash in Seyne today -  postponed himself pilot training in 2008 due to mental health issues and a friend said a friend was 'in depression'.
article_snippet: Airline bosses confirmed Lubitz had taken several months off work and had to retrain to join Lubitz but insisted a friend was '100% fit to fly'.
article_snippet: Marseille prosecutor Brice Robin said Lubitz locked Marseille prosecutor Brice Robin captain out after the senior officer left the flight deck.
article_snippet: At that point, Lubitz used the flight managing system to put the plane into a descent, something that can only be done manually - and deliberately.
article_snippet: : Mr Robin said Lubitz breathing was normal as the plane descended rapidly before crashing into the French Alps .
article_snippet: Earlier in the flight, Mr Robin said Lubitz's responses were initially courteous, but became 'curt' when Mr Robin began the mid-flight briefing on the planned landing of the plane.