I don’t get how this is supposed to solve whatever became of him?
On the face of it, he had to have died for many reasons.
He jumped from the side door of a 727. Dangerous jump with likely injury.
He jumped from over 10,000ft, in November, in the NE, into forest, at night with no cold weather gear or oxygen. This is also known as committing suicide. Superman himself couldn’t survive that.
As far as who he was, I don’t have a clue. But, if things happened as reported, whoever it was, he certainly died that night.