mh370
A man walks in front of a mural of missing Malaysia Airlines MH370 plane in a back-alley in Shah Alam, Malaysia, March 8, 2016. Getty Images/Manan Vatsyayana

Missing Malaysia Airlines Flight MH370 was deliberately crashed in a "murder-suicide," a former air crash investigator claimed, adding he had proof to back his theory. The Boeing 777-200 went missing on March 8, 2014, with 239 people on board while on its way from Kuala Lumpur to Beijing.

Canadian aviation expert Larry Vance, who has previously also spoken out about conspiracy theories related to the jetliner's disappearance, said recently he was “certain” either captain Zaharie Ahmad Shah or co-pilot Fariq Abdul Hamid took over the plane in what he said was “criminal event” and “made it disappear forever.”

“It’s not an accident. This was planned and conducted, carried out by one individual who had control of the aeroplane via his job to have control of the plane," Vance, who previously worked for the Transportation Safety Board of Canada, told CBC News. He claimed the pilot or co-pilot made the decision “to take it to a remote part of the ocean and make it disappear forever.”

Vance, who spent 18 months doing research for his book "MH370 Mystery Solved," also claimed sections of the flaperon, which was found, were positioned downward and the plane entered the water at a low speed. He concluding after analyzing the debris, which authorities said "most likely" belonged to the missing plane.

"I believe with 100 percent certainty that the aeroplane entered the water in a controlled ditching with the flaps extended," he said, according to the Sun, adding that this shows the plane was deliberately crashed into the sea.

Vance told 60 Minutes Australia: "We would call that a controlling ditching into the water... The only way that could happen is if someone was flying the aeroplane."

"In particular, if somebody selected the flaps to be in the extended position," he said, adding: "If the flaps were down, then somebody would have had to have put them down, and they had to have put them down intentionally."

Since the plane went missing more than four years ago, there have been several conspiracy theories including the one claiming that the pilot took the plane into a death dive and crashed it in a remote part of the southern Indian Ocean. A multimillion-dollar search for the plane, however, could not find the fuselage of the jet. In 2018, Malaysia released a final report claiming that investigators were unable to determine what might have happened to the jet. However, they did not rule out a third party involvement.

While the mystery of MH370 continues, many amateur searchers claimed they had spotted the plane in a dense jungle in Cambodia. The searchers pointed the plane's location on Google Maps. Despite some efforts made by them, this could not be confirmed.

In January, Victor Iannello, a member of an investigative group, used civilian radar data made public in April 2018 for his comprehensive report to claim MH370 pilot planned the disappearance.

“In order to better understand the sequence of inputs to the flight control system, we created a simulation using the PMDG 777 model in Microsoft Flight Simulator. In particular, we studied whether the aircraft might have been flown with the pilot providing inputs to the autopilot, and what those inputs might have been,” Iannello said, adding that it was possible the pilot tried to evade radar detection.

However, in December, an ex-United Airlines captain claimed pilots made desperate attempts to land the plane in Malaysia while the jet was on fire, rejecting the death-dive theory.

"The initial turn, whatever they did to get off the airway, I think they may have initially tried to go to Penang Airport," Ross Aimer, CEO of Aero Consulting Experts, told Daily Star at the time. "And while they were going towards it I think they either lost consciousness or they died, and then the aircraft went that way... And for some other reason it made another left turn, going south towards the south Indian Ocean."