The grand jury: A constitutional shield or a prosecutor's sword?

Science · Published 20 October 2026 Swipe more like this →

In short: In the United States, a group of citizens holds the power to decide if a crime has been committed before a trial even begins. While intended as a check on government power, critics argue the system often functions as a rubber stamp for the state, with rare exceptions for high-profile cases.

The grand jury is a unique legal body empowered to investigate potential criminal conduct and determine if charges should be brought. Unlike a petit jury, which decides guilt in a specific case, a grand jury typically serves for a sustained period, hearing evidence ex parte—meaning without the involvement of the suspect or the person of interest. While the federal government is constitutionally required to use grand juries for all felonies, only about half of the states currently do, with the rest using preliminary hearings.

Theoretically, the grand jury serves as a 'shield' against unjust prosecutions. This body holds substantial inquiry authority, which permits it to demand subpoenas and force individuals to provide testimony even if legal counsel is absent. However, the mechanism is often criticized because prosecutors generally draft the charges and select the witnesses. In practice, some argue the system can be used to extend prosecutorial power, allowing officials to see if a grand jury can secure enough evidence to move forward with a case they might otherwise lack the strength to pursue.

The independence of the grand jury is a subject of significant debate. Historically, grand juries were major checks on executive and legislative power, even playing a role in the American Revolution. Today, however, federal 'no-bills'—refusals to indict—are exceptionally rare; in fiscal year 2013, only about 5 out of over 165,000 proposed federal indictments resulted in a no-bill. While some observers noted a marked increase in no-bill decisions in late 2025 regarding protest-related activity, the decision to indict is often effectively unreviewable, making the grand jury's initial gatekeeping role profoundly consequential.

Beyond criminal law, some states utilize 'civil grand juries' to oversee local government operations or 'special grand juries' to investigate organized crime. These special bodies can be empaneled for up to three years in some jurisdictions. Despite their role, critics point out that grand juries may lack community representation, often skewing toward older, wealthier, and more educated citizens, and that the secrecy of the proceedings can reduce public accountability.

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