She is 19 years old, and therefore not a child.
I see no way in which her parents have endangered her. There is no profit to be gained in filing charges against the parents.
All that is needed and requested is a way to prove she is citizen. Surely there ought to be a few methods to achieve this. Outside of a paternity test, I am wondering if she or her parents have any sort of witnesses to her birth, video, etc.
So, would the Statute of Limitations have expired? Just wondering...........and, to me only I suppose, raising a child in such a way that they would find it almost impossible to prove their citizenship, receive the normal Identity stuff all other citizens receive..........DL, SSAN, Birth Certificate, and such would certainly be at the VERY LEAST "child neglect," but I contend it would be Endangerment...............simply because what if she is in dire need of Medical attention? Yes, she could go to an emergency room I suppose.........but that isn't the best option in my opinion.
Anyway, just wondering here.............and the last part of my first comment was tongue in cheek.......