(By Darren Boyle for MailOnline)
Air crash investigators examining a computer belonging to Germanwings co-pilot Andreas Lubitz are trying to determine whether the killer 'spiked' his captain's drink to force him into the toilet.
Lubitz, 27, crashed the Airbus A320 passenger jet into the Alps changing the aircraft's altitude to just 100 feet using the autopilot, sending it on collision course with the Alps.
German prosecutors believe that Lubitz may have added a chemical to Captain Patrick Sodenheimer's coffee to remove him from the flight deck. READ MORE OF THIS STORY