You can hire an attorney in Utah. Once Utah has the hold and begins he extradition process there is nothing you can do. If they do not extradite him within a certain period of time you are entitled to relief though.
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You can hire an attorney in Utah to represent him at his parole hearing. That's about it.
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I agree with Mrs. Jaggers. You need to start researching an attorney licensed in Utah that practices criminal law. He has signed a waiver to be extradited. If this is a parole warrant then he needs someone to represent him during the parole revocation hearing. If he is indigent and qualifies the Board of Pardons and Paroles in Utah will appoint an attorney to represent him.
The information provided is not advice but a legal perspective and you should schedule a consultation with the lawyer of your choice.