If you can find a lawyer who will take your case (and your money) have at it. But I doubt you will.

He can be charged and convicted. Hopefully his lawyer can resolve it.

Sue for what? You have no legal damages..........

Hard to believe you took the time to ask a bunch of lawyers whether you can flip someone off. Just don't.

This is a common scam. Google underage girl scam.....

Sue for what? No injury means no lawsuit....

Outside of asking her there is no way to force someone to tell you.

You can speak to the D.A. and make your wishes known, but they can still proceed. Lots of victims of D.V. change their minds.

Whatever it costs, it wouldn't be worth it as such a piece of paper is meaningless.

If there is no custody order you need to hire a lawyer and get one.