My pet theory from the beginning has been a pilot suicide, one where that pilot took the whole plane with him. I probably came to that conclusion more readily because of a similar incident that occurred near where I used to live, back before airline personnel were made to go through the regular security procedures as passengers: Wikipedia Article
So far as I can tell, it's the only scenario that fits with the facts we do know.
So far as I can tell, it's the only scenario that fits with the facts we do know.
