She was taking her car to the repair shop. It says so in the above story.
I did read that. It's puzzling that many reports, perhaps mistakenly, state that her partner was at the scene also. That's a strange thing to report without also reporting the partner's name, whether the partner fired any shots, whether the partner was wounded, and many other details.
Have you read anything else about other responders? Supposedly there were other responders. One article even mentioned the possibility of "friendly fire".