The pilot of the missing MH370 flight deliberately killed himself and his passengers by turning off the oxygen supply in a 'glory suicide', an investigator claims.
Airline boss Ewan Wilson says pilot Zaharie Ahmad Shah planned the tragedy as an "ultimate post-mortem triumph" and likely depressurised the plane, starving all those on board of oxygen.
The supply of oxygen from oxygen masks is limited to just 20 minutes meaning the entire plane would have slipped into a coma and died shortly after from oxygen starvation, reports the Western Daily Press.
Flight MH370 disappeared with its 227 passengers and 12 Malaysian crew members while en route from Kuala Lumpur to Beijing on 8 March this year.
Mr Wilson will suggest that Shah locked his co-pilot out of the cockpit, shut off all communication and turned the aircraft around.
He depressurised the plane causing passengers to die from hypoxia when the oxygen supply ran out.
He then made eight different course changes before finally allowing MH370 to fly on auto-pilot for the last few hours of its journey into the southern Indian Ocean.
Wilson said Shah then either ran out of oxygen or re-pressurised the plane before guiding it to its unknown final resting place.
"By a process of elimination, this leaves pilot suicide as the only other serious option in our analysis of what occurred on 8 March.
"Our research indicates there have been five previous incidents of murder/suicide in commercial flights over the last three decades or so, accounting for 422 lives.
"The sad addition of MH370 would bring that number to 661."
He has now travelled from New Zealand to Birmingham to discuss his finding with a number of experts.
The search for the missing plane is being led by the Australian Transport Safety Bureau.
But Mr Wilson believes it is "lost forever".
According to the Scotsman, he said: "The Australians will spend a lot of money on the search but I don't think we will ever find the missing aircraft.
"It would be nice to give families of those on board closure, and I know there are lots of reasons that families – as a result of grief and the lack of debris – are easily swayed by conspiracy theories that the aircraft is lying on some island.
"But I don't think it is. It is lost forever."
Flight MH370: £20k stolen from passenger accounts four months after disappearance
Missing Flight MH370: New evidence of cockpit tampering
Passengers and crew of MH370 'suffocated'