We've had single car FATAL accidents on our roads here before. It is always a reaction to deer crossings then ... and the fact that all our roads are tree-lined. Sudden movement of the steering wheel, loss of control, flight into the trees...
A little off topic but...You may or may not know this but I attended school for auto body repair and refinishing, there they tought us how to disect a wreak just by looking at the vehicle. That vehicle hit that tree very hard and with the front of the vehicle. A roll would not only change the point of impact but kill some speed, the damage to the roof came after impact with the tree. I can't tell from these photos where the crease along the side came but it happened wile it was moving with out a doubt. almost all the damage is indicitive of excessive speed.
The accident happened on a curve. The wreck is on the right side of the road, with the road curving to the left. The damage on the side of the car came from other trees to the right of the main tree you see with bark damage. The right side of the car scraped the initial trees, then hit the pictured tree head on, and it bounced to its final resting spot.