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What is a Grand Jury Subpoena?

By U. Ahern
Updated: May 16, 2024

A grand jury reviews evidence presented by a prosecutor in a criminal investigation and determines whether there is probable cause to return an indictment and go to trial. The grand jury subpoena is the tool used by the prosecutor to gather evidence to make the case. Subpoena translates as "subject to sanction," meaning that the recipient of the subpoena has to comply with the terms of the subpoena or face specific consequences.

Issued by the court, subpoenas are filled out by the prosecutor. They are delivered, or served, by a police officer or marshal to the person or entity required to appear before the grand jury. The prosecutor decides which witnesses to call and directs the grand jury investigation.

There are two kinds of grand jury subpoenas. A subpoena ad testificandum orders a person to testify before the grand jury. If the prosecutor is looking for specific evidence, he or she would seek a subpoena duces tecum. This type of subpoena requests evidence such as documents, tapes, test results, and photographs.

When served with a grand jury subpoena, there are three possible responses. Complying with the subpoena is the least complicated. If an appearance is requested, the witness comes to the jury on the date requested and submits to questioning. Evidence, if subpoenaed, is delivered in compliance with the terms of the subpoena.

An alternative response may be attempting to convince the court that it is not necessary to comply with the subpoena. The witness can claim a privilege, such as doctor-patient, that prohibits the giving of testimony before the grand jury. Attorney-client privileges can also be cited for not complying with a grand jury subpoena. The court has to be convinced to release the witness from testifying or providing evidence.

Refusing to appear before the grand jury is a third option, but a potentially costly one. When a witness refuses to appear, he or she is held in contempt. The witness can be sent to jail for the length of time that the grand jury is in session or until he or she is willing to cooperate with the grand jury, whichever occurs first.

The grand jury subpoena is a powerful tool that is used to gather physical evidence and testimony. A prosecutor has sweeping powers to call witnesses and direct the investigation. If the grand jury returns an indictment, the case goes to trial in a regular courtroom.

MyLawQuestions is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
By anon271058 — On May 24, 2012

Does a grand jury view evidence for juvenile court cases?

By BabaB — On Jun 20, 2011

The laws in most states are quite fair when it comes to the subpoena for welfare records to the grand jury. The justice system does not want to embarrass the welfare recipient, or to make all his financial and other records public.

Documents revealed are only those that are related to receiving welfare.

A few states have passed laws that say that the welfare recipient's records should be made public. I don't agree with this change. But, thank heaven, newspapers and media are still restricted from reporting the name of the welfare recipient and the amount they receive.

By Misscoco — On Jun 19, 2011

Nice overview! I'd just like to add that individuals belonging to elaborate organized crime groups are often given grand jury subpoenas to appear before a grand jury. Some of these organizations are hard to infiltrate, so if a prosecutor finds someone who seems to have information, they will issue a subpoena, hoping he/she will appear in court and talk or provide evidence about the whole group.

Of course, in the heyday of organized crime, some who were subpoenaed were able to run away and disappear. But today, with criminal investigation being so technical, this doesn't happen too often.

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