Why do we feel so compelled to insist that there must be a conspiracy in events like this?
If the captain was supposedly incapacitated then why did the FDR indicate that he made multiple adjustments to the decent rate and airspeed.
And there’s the fact that investigators had found that Lubitz had searched “ways to commit suicide” and “Cockpit doors and their security provisions” the week before the crash.
And then there’s the fact that BAE had determined that Lubitz had done a test run of setting the autopilot to descend on a previous flight while the captain left the cockpit.
And yet a new investigation is started because we are suppose to explore the possibility that the FO, who had a history of depression which was documented by doctors shortly before the crash, left the cockpit, then the cockpit door lock malfunctioned, then the captain became incapacitated, and then the A320 made an uncommanded decent?