Arizona is a "right to work" state.
That means you can quit with no reasoning, and an employer can fire you.
Do I think it's right? NOPE.
How do I know this? Not only do I live in Arizona, but I have owned my own business.
Now, if an employee has been fired, they do have the right to try and collect unemployment.
I'm not saying that she would be granted that, but she could try.
Also, it can all depend on where she was working. Was it a family owned business or a big corporation?
Perhaps this thread should be moved to the law forum where our law experts can help you with that. The only reason why I answered is because it was posted under workplace relationships.
I also think that Smoothy is correct. It sounds as if there is more to this story then she is telling.