Its been nearly five years since Malaysia Airlines Flight MH370 disappeared while traveling from Kuala Lumpur to Beijing with 239 people on board and there is still no closure for the families of the victims. While there have been several theories that have emerged since, the suicide mission claim has resurfaced after few veteran pilots raised doubts about the official report released by Malaysia in July.

Writing on an online forum for airmen, one experienced pilot suggested the official charts showing Flight MH370's final path were wildly inaccurate. In July, Kok Soo Chon, the lead investigator in the case, said that Flight MH370 deviated from its path "not because of anomalies in the mechanical system. The turn back was made not under autopilot but under manual control.” He said the civilian and military radar were consistent with each other on this point.

“Saying that the loss was not a pilot suicide based solely on the evidence that the descent was uncontrolled is entirely fallacious," the experienced pilot suggested. “How do they account for the early turns and deliberate disabling of the transponder? So the pilot set a course and rode it down, possibly even depressurising the cabin... It does not mean it was not deliberate.”

Another pilot wrote: “As a 777 type rated pilot, I am pretty much 100 percent sure that the known flightpath after the loss of radio/SSR contact required someone still alive manipulating it and/or someone to have programmed a route totally different to the original flight plan prior to the loss of contact.

“Both are deliberate acts incompatible with the best interests of those on board. Make of that what you will.”

And another veteran said: “For the aircraft to have followed the route it did, as opposed to what it was meant to, without any human intervention, would take so many extremely unlikely events in a continuous chain that the combined probability ends up so vanishingly small it can be effectively discounted.”

Another experienced pilot said conspiracy theories would continue to emerge until officials in both Australia and Malaysia share their information, according to Express.co.uk.

He wrote: “Throughout this whole tragic set of searches the ATSB and its Malaysian counterpart have been reluctant to let data into the public domain, where some of the world's extremely knowledgable and capable scientists, engineers and aviators with a combined expertise far exceeding that which the ATSB has, might have made effective contributions to the analyses, and at a much earlier stage.”

Former Canadian air crash investigator Larry Vance, who wrote a book about the mystery of MH370, had previously claimed that Captain Zaharie Ahmad Shah had turned off the transponder and depressurized the plane, knocking passengers unconscious before crashing into the ocean.

"He was killing himself. Unfortunately, he was killing everyone else on board. And he did it deliberately," Vance said.

The official report by Malaysia released in July, however, said that investigators found the pilot had no history of mental or psychiatric treatment, and that there was no evidence conflict issues with friends or family, no drug use, no evidence of troubled relationships with family members. There was also no stress or anxiety detected in the audio recordings from the flight.

The latest claims come as several independent searchers are now focusing on a jungle in Cambodia, where video producer Ian Wilson claimed to have spotted the missing plane on Google Maps. Wilson, who had set out on a ground search for the plane last month, aborted his mission in the Cambodian jungle due to the dangers on the path.

Meanwhile, pilot Daniel Boyer claimed to have spotted the engine of the missing plane on Google Maps. The British aviation expert had previously claimed to have located the missing plane fuselage, tail and the cockpit in the same area.