Subpoena Power of the Grand Jury

• Jurisdiction: Maryland

V. Subpoena power of the grand jury

A. Subpoena issuance

The grand jury has the power to compel testimony, production of documents, and production of physical evidence. United States v. Calandra, 414 U.S. 338, 343 (1974). A grand jury subpoena is requested by either the grand jury or the prosecution and issued by the Clerk of the Court or the grand jury, through its foreperson. Md. Rule 4-643(a). A subpoena ad testificandum is a command to testify before the grand jury on a certain date at a certain time...