Well, one thing seems for sure. He was out of fuel.
My guess also.
Probably out of fuel and the old story of trying to stretch his glide.
But you would expect anyone with his hours and intensive training to have kept a cool head.
On the other hand, I suspect that the military does not spend any time teaching fighter jocks the basics of dead stick landing.
More like blow and go.
The 210 has very long wings. The fuel is in the wings. It is essential that the plane be level when fueling or you can end up short a few gallons. I never planned the last 5 gallons!