I try and examine all angles.
Was she possible in reverse, speeding towards them in reverse, in panic, and took a round in the back of the head?
And no, I think the DEA blowing a 14 year olds head off is pretty damn tragic and I think this WOD is a lost cause and a waste of my money.
Its not plausible that one unarmed gal would try to ram 4 big guys dressed as gangbangers but I think you just nailed what the cover story in the official report will be.