call the clerk's office in the courthouse that the filing occured in to inquire. It is possible you may need to go in person to find out.

Since its a factual dispute the court will need to hear testimony and decide what if anything should happen.

There is a process to serve them at the jail/prison. You can contact the jail/prison that she is being held in.

You could do all of that, however, before you do anything you should speak to an attorney in private.

It depends on the allegations and if they can be proven. If there are a criminal charges, the person with the charges, should not testify as to...

This has a little to effect whatsoever in a custody decision. Below is the factors that the court looks at when determining an appropriate custody...

You should file for custody in the state the child resides in and possibly hire an attorney to represent you and provide you with legal advice.

You can file a motion to shield, but the court very rarely grants said requests in divorce cases. Good luck.

Speak to an attorney offline in the county you do not reside in so that you do not have to worry about that attorney knowing him .

Unless you live in Delaware, Delaware does not have jurisdiction over you as it relates to child support.