I've read a few other articles on this, and it's not entirely clear that she has committed a crime. According to a couple of other articles, her mother told her and her brother that they were born here - she may not have known that she was born in Mexico (and thus may not have known that her documents were fake).
Obviously, that may not be true. But, to charge her with a crime, you'd have to show that she knew.
This is not a new problem, its happened several times in the Border Patrol, the agent had no idea they were not born here as they lived their entire life in the US except for a week or two. Some didn't even speak Spanish.
The military has also experienced this problem.
If there was no intentional fraud involved they can be quickly naturalized and resume their duties.