article_snippet.sent: Andreas Lubitz may have spiked Andreas Lubitz Captain's coffee so Andreas Lubitz would be left alone on the aircraft's flight deck, investigators have now said .
article_snippet.sent: Recordings from the flight data recorder suggest co-pilot Andreas Lubitz locked his Captain out of the cockpit before 'deliberately' crashing the jet.
article_snippet.sent: Crash investigators are now examining a computer belonging to co-pilot Andreas Lubitz to determine whether co-pilot Andreas Lubitz 'spiked' co-pilot Andreas Lubitz 's drink to force co-pilot Andreas Lubitz into the toilet.
article_snippet.sent: German prosecutors believe that co-pilot Andreas Lubitz may have added a chemical to Captain Patrick Sodenheimer's coffee to remove Patrick Sodenheimer's from the flight deck.
article_snippet.sent: Once Captain Patrick Sodenheimer closed the cockpit door, co-pilot Andreas Lubitz enabled special security features preventing the reinforced door from reopening.
article_snippet.sent: Destruction: co-pilot Andreas Lubitz remained silent during the final eight minutes of the flight as co-pilot Andreas Lubitz crashed into the Alps .
article_snippet.sent: Investigators have been scouring co-pilot Andreas Lubitz's computers to determine his state of mind before the tragedy .
article_snippet.sent: Already the tragedy has emerged that co-pilot Andreas Lubitz used co-pilot Andreas Lubitz computer to research methods of killing co-pilot Andreas Lubitz as well as information concerning the cockpit door locking mechanism.
highlights_snippet.sent: Investigators have been searching Andreas Lubtiz's internet search history .
  
highlights_snippet.sent: Lubitz sought information online on various methods of taking Lubitz own life .