Missing plane lost, Malaysia says
bbc.com
bbc.com
Perhaps I'm jaded by the past few years of disinformation and spying, but I'm starting to believe that there's more to this story than meets the eye and because of that, we may never know what happened.
Wag the Dog comes to mind.
In any case, I find it strange to make this determination having not have found the plane.
The pilot suicide theory is probably the most likely after a failure/error IMHO.