
Federal Process
What Is a Federal Grand Jury and How Does It Work?
How the federal grand jury decides whether charges move forward, why its proceedings are secret, and what it means to receive a grand jury subpoena.
Most serious federal cases begin with a grand jury rather than a courtroom. Because grand jury proceedings are secret, they are widely misunderstood. This article explains, in general terms, what a federal grand jury does, how it differs from the jury at a trial, and what it can mean to be contacted by one.
This article is informational only. It is not legal advice, and reading it does not create an attorney-client relationship. The law changes and every situation is different. Talk with a lawyer about the specific facts of your case.
The grand jury's role
A federal grand jury is a group of citizens convened to decide whether there is probable cause to believe a crime has been committed and that a particular person committed it. If the grand jury agrees, it returns an indictment - the formal charging document that allows a felony case to proceed.
The Fifth Amendment requires that serious federal crimes be charged by a grand jury. The grand jury also has investigative power: it can issue subpoenas for testimony and documents while the government gathers evidence.
How it differs from a trial jury
A grand jury is not the same as the petit (trial) jury that decides guilt. The differences are significant:
- A grand jury is larger - typically up to 23 members - and only a majority is needed to indict.
- Its job is to decide whether charges should be brought, not whether someone is guilty beyond a reasonable doubt.
- Proceedings are secret, and the standard of proof - probable cause - is far lower than the trial standard.
- A defense lawyer is generally not present in the grand jury room while a witness testifies.
Why proceedings are secret
Grand jury secrecy is built into the Federal Rules of Criminal Procedure. The rules are designed to encourage candid testimony, protect the reputations of people who are investigated but never charged, and reduce the risk that a target will flee or tamper with evidence.
Secrecy also means that learning a grand jury is examining your conduct can be difficult. Sometimes the first sign is a subpoena to a witness, a custodian of records, or the person under scrutiny.
Receiving a grand jury subpoena
A grand jury subpoena may command testimony, the production of documents, or both. Receiving one does not necessarily mean you are accused of a crime - but it is a serious legal obligation with deadlines, and the way you respond can matter.
People who receive subpoenas are often described as a witness, a subject, or a target. These labels carry different implications, and a person's status can change as an investigation develops. Because of that, many people speak with a lawyer before responding so they understand their obligations and any protections that apply, such as the Fifth Amendment privilege against self-incrimination.
Where this fits in the larger process
An indictment is a beginning, not a conclusion. After charges are returned, the case moves to arraignment, discovery, pretrial motions, and - if it is not resolved by agreement - trial. Understanding the grand jury stage helps explain why early decisions, made before charges are even filed, can shape everything that follows.
Authoritative sources

Facing a federal investigation or serious charges?
Speak directly with George G. Mgdesyan about your situation. Consultations are confidential, and the sooner you call, the more can often be done.
