Thank you again. The Der Spiegel account is far more through than the US press.
However, there still is one glaring omission: They do mention the two alarms - decent and proximity to ground, but still there is no mention of the alarm that is issued when the keypad is used to request a door opening. That alarm would have had to have sounded before the co-pilot could have disabled the opening. While the co-pilot has the ability to override the unlock command, there is no actual report or indication that he did so.
The putting the plane into the initial decent is also not as ominous as some reports indicate. Apparently the pilot did ask the the co-pilot to prepare the plane for landing. The first step could be to gradually reduce altitude.
Just being devil's advocate, consider the following possibility: The pilot is having financial troubles and has a large life insurance policy. If he crashes the plane, his heirs get nothing and he is labeled a monster. However if he drugs the copilot, he goes down in history as the hero who unsuccessfully tried to save 150 innocent people and his heirs collect. The co-pilot has already been tried and convicted in the press, all on hearsay testimony.
I guess I will have to wait for the official investigation to find out what really happened.