The Oklahoma AO-89 Subpoena in a Criminal Case serves as an official form used in the Federal District Court for issuing subpoenas in criminal cases in Oklahoma. This document is essential in obtaining the attendance of witnesses or the production of documents or other tangible evidence required for the trial or other legal proceedings. The Oklahoma AO-89 Subpoena in a Criminal Case — Federal District Court Official Form is used to compel individuals to testify or provide evidence relevant to the case. It must adhere to the formalities and regulations set forth by the court to ensure its validity and enforceability. The subpoena typically contains important details such as the case caption, court information, and the party requesting the subpoena. Keywords: Oklahoma AO-89 Subpoena, Criminal Case, Federal District Court, Official Form, subpoenas, witnesses, production of evidence, legal proceedings, trial, documentation, formalities, court regulations, case caption, party requesting the subpoena. Different Types of Oklahoma AO-89 Subpoena in a Criminal Case — Federal District Court Official Form: 1. Witness Subpoena: This type of subpoena is issued to compel specific individuals to appear in court and testify as witnesses in a criminal case. This is crucial in ensuring the presence of key witnesses who can provide essential information and support the prosecution or defense. 2. Subpoena Ducks Cecum: In some cases, it may be necessary to request specific documents or tangible evidence. A Subpoena Ducks Cecum refers to a subpoena that requires the production of documents, records, or other physical evidence relevant to the criminal case. This form ensures that crucial evidence is obtained in a timely and authorized manner. 3. Expert Witness Subpoena: Expert witnesses, possessing specialized knowledge or skills, may be called upon to provide their professional opinions or interpretations during criminal proceedings. An Expert Witness Subpoena, specific to Oklahoma AO-89, is used to compel these professionals to testify and share their expertise for the benefit of the court. These different types of Oklahoma AO-89 Subpoena in a Criminal Case — Federal District Court Official Forms cater to various needs during legal proceedings and are crucial in acquiring accurate and compelling evidence for the successful resolution of criminal cases.