The doomed MH370 flight could have crashed in a completely different location from where searches were carried out, according to a satellite researcher.
Cyndi Hendry, who worked for satellite imagery company Tomnod, discovered something that looked like aircraft debris in the South China Sea just days after it disappeared in March, 2014.
She told a new Netflix documentary about the downed plane that her discovery was initially ignored, as most investigators believed the plane had crashed into the Indian Ocean.
The piece of wreckage she found was etched with the letter "M", making it almost a "perfect match" to the same letter found on the side of the Malaysia Airline Boeing 777 flight.
The flight, which went down while travelling from Kuala Lumpur to Beijing, has stumped investigators for almost nine years.
Cyndi, who is from Florida, told the documentary MH370: The Disappeared Plane: "When I saw the anguish on the faces of these family members, I thought I had to do something.
"It just tugged on my heartstrings. My hobby is photography, so I have an eye for detail.
"I thought I could be a great person to help look for this plane from the satellite images."
The volunteer was working for Tomnod, a now-defunct satellite company, which randomly assigned people across the globe satellite images to scour.
She added: "The satellite images were empty. It was just the blackness of the sea. Then you press next, more black scans. So much black. And then finally, there's something white."
She claimed to see a mass of debris, which appeared to be white, in the South China Sea close to Vietnam.
It was near to where the flight vanished from radar screens.
"I pulled the schematics off the internet for a Boeing 777. And I was able to identify a piece as the nose cone," she said.
"That's when I started saying, 'Holy crap! There's a piece of debris. There's the airplane".
She added: "And then I started seeing more pieces. Something that looked like the fuselage. Something that looked like the tail. I got goosebumps."
After contacting investigators and Malaysia Airlines, she claims to have been ignored, repeatedly.
She said: "I knew what I had. I knew I had evidence in the South China Sea.
"The more I searched, the more debris I found. I feel certain that this is where MH370 ended up, off of Vietnam.
"At that point, I already had contacted Malaysia Airlines. I tried to reach out to so many people to tell them that this debris exists. Nobody was listening to me."
Malaysian investigators called off the search in the same area because another company produced alternative data, showing that the plane had gone down in the Indian Ocean.