maybe its not as "sinister" as you all make it out to be. Maybe they still have no clue and are just trying to save face and put an end to it. Not right, but doesn't necessarily mean its a major government conspiracy, either.
Malaysia Airlines is a national company and should this prove to be another case of pilot suicide -- the co-pilot of EgyptAir Flight 990 that crashed off New England in '99 and which Egypt still denies as suicide to this day -- the Malaysian gov't stands a lot more to lose in lawsuits than just face.
FYI: There have been three "accidents" involving passenger fatalities on Malaysia Airlines for a total of 134 confirmed fatalities:
4 December 1977 - Malaysian Airline System Flight 653, a Boeing 737-200 registered 9M-MBD was hijacked and crashed in Tanjung Kupang, Johor, killing all 100 people on board ...
15 September 1995 - Malaysia Airlines Flight 2133, a Fokker 50 registered 9M-MGH touched down too far along the runway at Tawau Airport, Sabah and crashed in a shantytown during the subsequent go-around. Of the 49 passengers and 4 crew on board, 32 passengers and 2 crew were killed. The probable cause was poor handling of the aircraft by the pilot. ...
8 March 2014 - Malaysia Airlines Flight 370,a Boeing 777-200ER registered 9M-MRO carrying 227 passengers and 12 crew, went missing on a flight to Beijing Capital International Airport from Kuala Lumpur International Airport. Although the whereabouts of the plane were still not known, officials with both Malaysia Airlines and the Malaysian government believed the plane was lost in the Southern Indian Ocean and that all 239 people on board perished. If this presumption holds, it would be the deadliest aviation accident in the region and the deadliest aviation incident in Malaysian history.