I didn't consider that someone could have forced the pilots. But it still seems too farfetched. We'll see eventually.
but why do you think suicide is more likely ?? Why would you fly that far to commit suicide ?? You dont think the other pilot would've noticed ??? It would be much easier to just take it down the second the other pilot goes on a bathroom break because he sure as hell is gonna notice you've turned around.
Plus they were already going into a communications dead zone when they turned the power off, if you were about lose communication any way you could've easily went down in that area with no one trying to reach you.