There are a number of services that can perform a "skip trace" search for an individual for a nominal fee (typically no more than $100).
If this answer was helpful, please mark it as helpful or as a best answer. This answer is for general education purposes only. It neither creates an attorney-client relationship nor provides legal guidance or advice. The answer is based on the limited information provided and the answer might be different had additional information been provided. You should consult an attorney.
You have several issues. For divorce and child support, you would have to speak to a matrimonial attorney. As far as the immigration side of things, he did not include you and you are no longer together so you can't benefit from his application. Speak to your employer if they are willing to sponsor you.
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I agree with my colleagues.
Samuel Ouya Maina, Esq. 415.391.6612 email@example.com Law Offices of S. Ouya Maina, PC 332 Pine Street, Suite 707 San Francisco, CA 94104