While the media report that Najib Razak has now officially declared the plane as crashed with no survivors, based on satellite data analysis, I still feel uneasy about the whole case.
As far as I understand, actual debris from MH370 has not yet been found and positively identified. In that light, I consider Razak's statement as the most probable outcome, but in no way confirmed.
To me, it appears that due to public pressure and because of the upcoming car racing event, the Malaysian government wants to put a quick end to the story.
A lot of loose ends still need to be tied up.