NAL but if I’m understanding correctly the ex wife took of with their child to another state, failed to respond to the necessary court documents and she’s not following the current court orders. It sounds like the judge may order her to return the child to your son, award him custody and possibly further consequences.

So normally what they do is they try and access your Facebook, they will send a password reset and since it’s your account it’s linked to your email. The code in your email is your password reset code. When you give it to them they enter it and change the password on your Facebook taking control. They will then use your Facebook and getting it back is quite hard as Facebook doesn’t have a number you can call for assistance you have to do the automated help and it’s mostly no use. Do not send codes out for anything. They are pretty good and remove your previous email and number and they will use your account to get more account from your friends list.