He was the one that did not board the plane after checking the luggage with the bomb planted inside.
There was some internet chatter about it but the wire tap order did not get clearance fast enough to keep the plan from taking off. (s/)
FWIW, I'm betting age and corrosion for the accident. But I'm still curious about the 20th passenger.
You better make your sarcasm tag bigger. Some people will probably miss it. ;-)