You need the DA to sign a document identifying you as a victim of violent crime in order to get the visa. For more information schedule a conference with an immigration attorney.
I changed your practice area to immigration. Despite the description of a serious crime, your question really is more suited to the immigration attorneys. Best wishes to you.
Consultation with an immigration attorney can go a long way for you.
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.
I agree with Mr. Kaman. The states attorney needs to support and sign an application that identifies you as a witness to a crime usually with a case currently in court.
It is usually best to have the application signed and sent in while the case is pending. Some people wait too long and attempt to get support for a U visa after the case is closed or conviction is entered.
Many states attorneys will not support a U visa if the conviction is entered or a case is dismissed.
This is general information, not legal advice, and does not create an attorney client relationship.