A New Jersey Subpoena in a Criminal Case (AO 89) is a legal document issued by a court or other government agency, requiring a person to appear in court or other legal proceeding. It may also be used to request documents or other tangible evidence for use in a criminal case. There are three types of New Jersey Subpoenas in a Criminal Case (AO 89): Grand Jury Subpoena, Witness Subpoena, and Subpoena Ducks Cecum. A Grand Jury Subpoena is typically issued to compel a witness to testify before a grand jury. A Witness Subpoena is issued to compel a witness to testify at a criminal trial. Subpoena Ducks Cecum is issued to compel a person to produce documents and other tangible evidence for use at a criminal trial.