It is understood Captain Zaharie had personal issues.
A New Zealand criminologist has come out in support of a theory that the captain of the missing Malaysia Airlines aircraft was on a suicide mission.
University of Canterbury Professor Greg Newbold, who lectures on terrorism, said the only person who could have changed MH370's computerised flight plan and switched
off its electronics was someone who was highly experienced.
That person, he acknowledged, could only have been the pilot, Captain Zaharie Ahmad Shah - a man with 30 years' flying experience.
His co-pilot on the March 8 flight, 27-year-old Fariq Abdul Hamid, was fairly inexperienced; having only been on his sixth flight in the cockpit and the first time as an unaided pilot.
"We know that after changing course, the aircraft flew briefly above its maximum ceiling. If the pilot had then depressurised the aircraft, all passengers and the crew - including the pilot - would have lost consciousness within a few minutes," Professor Newbold said.
