Because she's a she, which carries a lot of weight in an industry that trips all over itself to find diversity hires and signal its virtues, I'm guessing she was pointed toward the door and invited to exit. Termination would have had a good shot at making the news and continuing the PR nightmare for the company.

As for how she got hired again, when your company is in the position of hiring direct entry captains, you take what you can get. But I'd bet she's on a very short leash.