General Patton's fatal auto accident: What happened?

Factual Questions
1

So far as I know, there were four people at the scene: The two drivers, and in Patton’s car, Patton and General Hap Gay.

The other three had no serious injuries. Patton, however, suffered a neck injury, and succumbed a couple of weeks later.

Since there were possibly three (surviving) eyewitnesses, is there a record of their testimony as to what actually happened?

General Gay lived until 1983, I believe.

The “other” driver lived until 1994, and Patton’s driver (who was not his “usual” driver, IIRC) died only last year.

Point being, there were plenty of opportunities in the intervening years to get “the straight dope.”

What happened?

2

The obituary of the driver, Horace Woodring

It mentions that he wrote an article describing the accident for Soldier of Fortune magazine in 2001. Good luck finding that though.

3

General Patton’s car braked suddenly to avoid a truck pulling into the road. Nobody else in the car was injured, but Patton, sitting in the rear seat, was thrown forward against the the front seat. In a freak occurrence, he suffered a skull fracture and a broken neck. He was paralyzed from the neck down.

He lived on for several months, while doctors tried restore him to health. He was finally struck by an embolism and died suddenly. This does occur in conditions of paralysis; blood clots develop in your arteries and then break free. They “jam” the heart and lungs, almost as if you had a clod of dirt in your car’s gas line.