It shouldn't be hard to reproduce the accident scene, and find what went wrong.
What I wonder is, even if we admit that the lidar didn't see her, at some point she was in the headlights, and the cameras should have seen her. For almost a second. Too late to avoid the accident, but never too late for an emergency break, reducing the damage. If it takes more time for a computer to recognize the situation and react than for a human, we have another big problem.