The crash expert, Larry Vance, made a special claim after serving as an investigator because he did not take him seriously.
MH370: Vance, who wrote the book Mystery Solved, told the Daily Star: "The Indians are on the sea floor inside the fuselage, which ended in southern India and was not sunk and damaged."
Experts say there is evidence of where the Boeing 777 went, but it has not been taken seriously yet.
He honestly believed that when the formal investigative team saw the physical evidence we found, and the way we interpreted it correctly, the idea of MH370 changed.
"Unfortunately, I am disappointed."
Vance spoke of his work as a "professional explanation" of what happened and said it was his "duty" to do so.
The disappearance of the flight MH370 has sparked various theories since March 22, 2014, when 227 passengers and 12 crew members boarded and disappeared from Kuala Lumpur to Beijing.
A popular topic for the theory is the government's concealment, many of whom have just given an explanation that the CIA, Russia, China or Malaysians are responsible for the real reason for the disappearance of the plane.
Mahathir Mohamad, the current Malaysian prime minister, confirmed the theory and suggested that US secret agents knew the location of the plane.
In 2014, he said, "Someone is hiding something."
Another theory is battery explosion or machine failure.
The cargo holds more than four tons of mangosteen fruit and over two tons of lithium ion batteries.
The dreaded juice from the fruit leaked into contact with the battery and caused an explosion.
One well-known theory is that the air pressure in the cabin is depressurized and the life-saving oxygen mask does not work.
At an altitude of 35,000 feet, the people on board would only have 30 and 60 seconds to lose consciousness.
This theory can explain why the distress call was not heard from the cockpit or passengers.
The pilot of the MH370 was the final voice before the plane disappeared, and some were forced to believe in his accusations.
"Say goodbye to Kuala Lumpur Air Control," said Zaharie Ahmad Shah.
Two minutes later, the airplane tracking system was interrupted, and some related farewells and disappearances.
This theory was denied by the investigator.