This is an immigration question. Please pass to that area.

This is an immigration question. Pass to that area.

I'm not sure there is a question here.

It would help to know what country he/she represents and what the diplomatic immunity would protect.

This is an immigration question. Pass to that area.

If you are in Mexico and the problem is there, hire a Mexican attorney and have him fie suit.

If the children and the parents are in Egypt the jurisdiction is pretty much there. I don't see how hiring a US lawyer would help.

Sure. Hire a Portuguese lawyer and sue him.

This is an immigration question. Pass to that area.

This is a family law matter. A court with jurisdiction over the custody of the child cn make such orders as it sees fir.