Peter McMahon has worked on crash investigations for more than two decades and has been searching for MH370 since its disappearance on March 8 2014.
Now he argues that the jet is at a location 10 miles (16km) south of Round Island, north of Mauritius - as reported by the Daily Star.
He has scoured images from Nasa and Google Earth to find what he thinks is the outline of part of an aircraft just below the surface of the water.
But the 64-year-old explosively said the flight’s whereabouts - unknown since starting its journey between Kuala Lumpur and Beijing four years ago - is being kept from the public.