The mysterious case of what Sonny DesVergas claimed attacked him one hot August night in Florida back in 1952 seems to have suffered from a collective lack of focus in UFO circles. I suspect that the following months Flatwood Monster story took the national attention away from this forgotten report.
The histroy channel have written an excellent article looking back at the DesVergas case and discuss how a case that was dismissed as a hoax despite two compelling points. Multiple witnesses and physical evidence.
This is an excellent read: Enjoy.