No. Not every criminal case goes to a grand jury. Whether one is used depends on three things: whether the case is federal or state, how serious the charge is, and what the prosecutor chooses to do. Federal felonies must be brought by grand jury indictment under the Fifth Amendment. About half the states require the same for at least some serious felonies; the rest let prosecutors file charges after a preliminary hearing instead. Misdemeanors almost never involve a grand jury anywhere in the country.
When a Grand Jury Is Required in Federal Court
The Fifth Amendment says no one can be “held to answer for a capital, or otherwise infamous crime” without a grand jury indictment.1Cornell Law School. Fifth Amendment “Infamous crime” has come to mean any offense that could result in imprisonment in a federal penitentiary. The Supreme Court has said the test looks at the punishment the law authorizes, not what the defendant actually receives. Offenses punishable only by a small fine or by six months or less in jail can move forward without an indictment.2LII / Legal Information Institute. 5th Amendment Grand Jury Clause Doctrine and Practice
The practical result: virtually every federal felony goes through a grand jury. Federal misdemeanors and petty offenses do not; they’re charged by a prosecutor’s information or a criminal complaint. Military prosecutions are also outside the rule. Service members facing charges under the Uniform Code of Military Justice are handled through the military justice system rather than a civilian grand jury.1Cornell Law School. Fifth Amendment
A federal grand jury has between 16 and 23 members.3Office of the Law Revision Counsel. 18 USC 3321 – Number of Grand Jurors; Summoning Additional Jurors At least 12 must agree before an indictment can be returned.4Legal Information Institute. Federal Rules of Criminal Procedure Rule 6 – The Grand Jury The jurors don’t decide guilt. They decide only whether there’s probable cause to believe a crime was committed and that the accused committed it. That’s a much lower bar than the “beyond a reasonable doubt” standard at trial. Proceedings are one-sided: the prosecutor calls the witnesses, the accused isn’t in the room, and defense counsel doesn’t participate. If the jurors find probable cause, they return an indictment, sometimes called a “true bill.” If not, they return a “no bill,” and charges are typically dropped.5Cornell Law Institute. True Bill A no bill doesn’t permanently block prosecution. Because no trial took place, double jeopardy doesn’t attach, and a prosecutor can bring the case to a new grand jury if stronger evidence appears.
Why State Cases Are Different
The Fifth Amendment’s grand jury requirement applies only in federal court. In 1884, the Supreme Court held in Hurtado v. California that the Fourteenth Amendment does not force states to use grand juries at all.6Cornell Law Institute. Hurtado v People of the State of California Each state has been free to decide for itself ever since.
Roughly 23 states require grand jury indictments for at least some serious felonies. The rest treat the grand jury as optional and let prosecutors bring felony charges by filing an information after a preliminary hearing. A couple of states have essentially stopped using grand juries for routine criminal cases. Most states still have grand jury statutes on the books, but whether one actually convenes often depends on local practice and what the prosecutor decides makes sense.
The Preliminary Hearing Alternative
When a case doesn’t go to a grand jury, the usual substitute is a preliminary hearing. It is a very different proceeding. Where the grand jury meets in secret with only the prosecutor present, a preliminary hearing happens in open court before a judge, with both sides in the room.7Legal Information Institute. Preliminary Hearing
The prosecutor still has to show probable cause, but the defense gets to push back. The defendant is present with an attorney, who can cross-examine witnesses and challenge the evidence. If the judge finds probable cause, the case proceeds to trial on an information rather than an indictment. If the evidence falls short, the judge can dismiss the charges.7Legal Information Institute. Preliminary Hearing
Each path has tradeoffs. Preliminary hearings give the defense an early look at the prosecution’s evidence and a chance to test it under oath. Grand jury proceedings give the defense nothing of the sort, since the defense isn’t there. Many prosecutors prefer the grand jury for exactly that reason.
Misdemeanors and Petty Offenses
Misdemeanor cases almost never involve a grand jury, in state or federal court. They’re typically initiated by a criminal complaint filed by a police officer or by a prosecutor’s information, and the case moves straight to arraignment. If you’re facing a misdemeanor, don’t expect a grand jury step, and don’t read anything into its absence.
Defendants Who Waive the Indictment
Even where a grand jury indictment is constitutionally required, a defendant can waive it. This happens more often than most people realize, usually as part of a plea agreement. The waiver has to take place in open court after the defendant has been informed of the charges and their rights.8Legal Information Institute. Federal Rules of Criminal Procedure Rule 7 – The Indictment and the Information One category cannot be waived: offenses punishable by death always require a grand jury indictment, no matter what the defendant agrees to.
The reason to waive is usually speed and leverage. A defendant negotiating a plea often wants to resolve the case quickly. Waiving the indictment lets the prosecution file an information and move forward without waiting for a grand jury to convene, and the defendant typically gets a more favorable plea offer in return. The cost is real, though. Once you waive, you lose the chance that a grand jury might have returned a no bill.
When Prosecutors Choose a Grand Jury Even Though They Don’t Have To
In states where a preliminary hearing would satisfy the law, prosecutors sometimes still choose the grand jury route. The reasons are practical.
Grand juries have investigative powers that no preliminary hearing offers. A prosecutor can use the grand jury to subpoena documents, compel witnesses to testify under oath, and build a case over weeks or months.9United States Department of Justice. Justice Manual 9-11.000 – Grand Jury That makes the grand jury especially useful in complex white-collar fraud, public corruption, and organized crime cases where the evidence doesn’t arrive neatly from a single crime scene.
Grand jury presentation also locks witnesses into sworn testimony early. If a witness changes their story at trial, the prosecutor can use the grand jury transcript to challenge their credibility. And in politically sensitive matters, such as a police shooting or charges against a public official, an indictment from a panel of citizens carries a different kind of public weight than charges filed unilaterally by the prosecutor’s office.
Grand Jury Is Not the Trial Jury
People sometimes conflate the two, but they do different jobs.10United States Courts. Types of Juries A grand jury decides whether charges should be brought. A trial jury, sometimes called a petit jury, decides whether the defendant is guilty. Grand juries have 16 to 23 members; trial juries have 6 to 12. Grand jury proceedings are secret and one-sided; trials are public and adversarial. A grand jury serves for months and reviews many cases; a trial jury hears one case and is dismissed. And the standards are different: probable cause for a grand jury, proof beyond a reasonable doubt for a trial jury in a criminal case.
So if you’re trying to figure out whether a particular case will see a grand jury, start with the court. Federal felony? Almost certainly yes, unless the defendant waives. State felony? It depends on the state and, often, on the prosecutor. Misdemeanor? Almost certainly no.