Legal Question in Civil Rights Law in Washington

I have to admit that I have not researched this topic, so this answer is more highly educated guess than well researched answer. That said, I believe you have a cause of action for negligence in that the store attendant or owner had a duty to ensure your safety if reasonably possible and failed to do so while you were being mugged in front of them, as well as by refusing to call the police.

I suspect they did not want the negative attention police lights and sirens might bring. The real question will be what damage did you suffer and how to prove it? That's a difficult one, given that you will have to prove how it made you feel, as opposed to having a broken leg in a car accident, where proof of damages is readily apparent.

By the way, there are other potential causes of action that you may have, such as negligent infliction of emotional distress; intentional infliction of emotional distress, and maybe some others that don't readily come to mind.

If you are serious, you should seek out local counsel for a consultation and go from there. Best of luck to you!