MH370 pilot switched off oxygen to kill himself, according to Kiwi Airlines boss | Daily Mail Online
'"We know what happened," David Learmount, safety editor at Flight Global, has said of MH370. "There's only one thing it can be - a deliberate act by someone on board, probably the captain."
But the idea is highly controversial.
"The pilot suicide theory for flight MH370 has gained traction because, throughout the last year, there's been no evidence of an outside plot," says aviation writer Sylvia Spruck Wrigley.'
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