What legal document is used to command an officer to take custody of a witness?

The correct legal document used to command an officer to take custody of a witness is known as an Attachment. In the context of Texas law, an Attachment is a specific type of court order that directs law enforcement to apprehend a person, typically when that individual is a witness who has failed to appear in court as required. This mechanism ensures that the court can enforce its process by compelling the attendance of witnesses, which is essential for the fair administration of justice.

The other options do not serve this purpose. A Writ of Habeas Corpus is primarily used to challenge the legality of a person's detention or imprisonment, focusing on issues pertaining to wrongful confinement rather than securing witness attendance. A Mandate generally refers to an order from a higher court to a lower court or government official to perform a certain act within their duties and does not pertain to securing the presence of a witness. A Notice of Hearing is a document that informs parties about the time and place of a court proceeding but does not command the custody of any individual. Thus, Attachment is the appropriate term for the command to take custody of a witness.