The mystery behind the disappearance of Malaysia Airlines Flight MH370 continues with a new data stating that the plane was “piloted until the end.” The latest data from French investigators renew theories about hijacking and murder-suicide.

According to the investigators, new technical data “lends weight” to the assumption that “someone was behind the control stick when the plane broke up in the Indian Ocean.” The team investigating the plane's disappearance said “certain abnormal turns made by the 777” could only be carried out by hand, according to Express.UK.

“Someone was in control. It is too early to make categorical claims as to exactly what happened but there is nothing to suggest anyone else entered the cockpit... The question remains though was the captain a hero or a villain," a team member reportedly said. However, these claims could not be independently verified.

Flight MH370 went missing on March 8, 2014, with 239 people on board while on its way from Kuala Lumpur to Beijing. A multimillion-dollar search for the plane in a remote part of the southern Indian Ocean yielded no concrete clues as to the jet's whereabouts. Since the plane went missing, several conspiracy theories emerged including some blaming the plane's pilot, Captain Zaharie Ahmad Shah, of intentionally veering the jet off course in an attempt to crash the Boeing 777-200.

While several theorists hinted at Shah's involvement in the case, there was no official confirmation about the theory. The Malaysian government also said there was no indication of a murder-suicide. The family of Shah has also denied the claims.

In March, Journalist Ean Higgins, who authored a recently released book titled "The Hunt for MH370,” blamed Shah of depressurizing the aircraft just 40 minutes into the flight. “You can just press a button above your head and the aircraft will cut the oxygen. We think he also tripped the circuit of the lights in the passenger cabins to make it dark. He then flew on for about another six hours," he told the Australian broadcaster ABC News.

Meanwhile, there were also theories that the plane was hijacked and someone broke into the cockpit of the plane and took control of the jet. However, there was no evidence to back this theory as well.

In July 2018, Malaysia released a report stating that 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.” However, it added that a “third-party interference” couldn’t be ruled out.

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A woman walks past a banner bearing solidarity messages for passengers of the missing Malaysia Airlines flight MH370, during a memorial event ahead of the fourth anniversary of the ill-fated plane's disappearance at Kaula Lumpur, Malaysia, March 3, 2018. Getty Images/Manan Vatsyayana