This whole thing is a very sad situation. Although there is a lot of speculation here,, there wont be when the investigation is complete. And this one is not that hard to figure. The driver of the white sedan is at fault,, Period. But if that stinger hit her head, there will be no mystery about it. If you look close you can see what appears to be the angled marking of the stinger hitting the door, A slight grey looking line goes up right over the door handle. There looks to be about 1' -1 1/2' penetration into the passenger compartment right at the point of impact. That means the stinger was probably more than 2 foot inside the passenger compartment,, very close to head level. The penetration falls off toward the rear of the car, not because anyone was turning, its because thats where the bumper or stinger slid into the strength of the B pillar and the car started bouncing off. It looks like the car had side air curtains. Although a crash like this could have killed the girl even without the stinger,,, it is unlikely due to the crumple zones and design of cars in general. one and a half feet of penetration is a lot,, but its definitely survivable, especially with side curtains. My guess is the damage to the young ladies head has been attributed to the stinger by the professionals on scene and in the hospital. Again,,, sad.