A Warrant for the Arrest of a Witness or Material Witness in a Pending Criminal Case is a legal document issued by a court or magistrate, authorizing law enforcement to apprehend and arrest a person suspected of being a witness or material witness in a pending criminal case. This warrant may also be used to compel the person to appear in court or otherwise cooperate in the investigation or proceedings of the case. There are two main types of Warrant for the Arrest of a Witness or Material Witness in a Pending Criminal Case: an arrest warrant and a summons. An arrest warrant is a court order that requires law enforcement to take the person into custody and bring them before the court to testify or provide evidence. A summons is an order to appear before a court or magistrate to provide testimony or evidence in support of a criminal case. In either case, the warrant must include the name of the individual suspected to be a witness or material witness, the criminal case in which they are purported to have knowledge, the date and time of the court hearing, and the signature of the issuing judge or magistrate. The warrant must also include a description of the person to be arrested or summoned, including their name, address, physical characteristics, or other identifying information.