An answer to your second and third questions turns on several pieces of information you found unnecessary to include in you post, to wit your immigration status and the manner in which you husband came to the USA; Illegal may refer to manifold situations, not a single manner of entry . As far as your first question is concerned, at the very least you need a consultation with an immigration attorney
NYC EXPERIENCED IMMIGRATION ATTORNEYS www.myattorneyusa.com; email: firstname.lastname@example.org; Phone: (866) 456-8654; Fax: 212-964-0440; Cell: 212-202-0325. The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter.
Whether or not you wish to hire an immigration attorney is your choice but it may not be necessary at this time. An immigration attorney can analyze your husband's situation and criminal charge and let you know if he will be eligible for any immigration relief should he placed into removal proceedings. If he is picked up by ICE and removal proceedings are initiated, he may or may not be eligible for bond depending on various factors and in the discretion of the judge. I have seen cases in which the person in removal proceedings have 3 DUIs and are given bond but every case must be analyzed on its specific facts.
Get a better criminal attorney to work out the best possible deal for your husband. You can meet with an immigration attorney to see what if anything that can be done for your husband (without the ICE hold).
This is not legal advice and a client attorney relationship is not created. For a free consultation call (718)234-5588.
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