Your needs are obviously in the area of Immigration law and I'm going to edit the question to reflect that fact. Good luck.
You may want to reach out to Attorney Carl Schusterman here on AVVO. He is in California and is an excellent immigration attorney.
Or you may select an attorney from any other state. Immigration is an area of federal law and any attorney from all over the country can handle an immigration case with the same level of success as an attorney in CA.
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FYI - Even if you seek expungement, you will always disclose this charge/ arrest/ conviction on your immigration forms.
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