Dennis v. United States
Citation: 384 U.S. 855 (1966)
Facts
Dennis was convicted of perjury based on his testimony before the House Un-American Activities Committee. He sought disclosure of grand jury testimony by government witnesses to aid in his defense. The government argued the secrecy of grand jury proceedings barred disclosure.
Issue
Must the government disclose grand jury testimony of its witnesses to a defendant when it may be material to the defense?
Holding
Yes. When a defendant makes a plausible showing that grand jury testimony of a government witness might be inconsistent with the witness’s trial testimony, the defendant is entitled to inspect the grand jury minutes. Grand jury secrecy yields to a defendant’s need for material information.
Rule
Grand jury testimony disclosure: The secrecy interest in grand jury proceedings must yield when a criminal defendant makes a particularized showing that a government witness’s prior grand jury testimony may be material and helpful to the defense. The defendant need not show certainty of inconsistency — a plausible showing that the testimony may be helpful suffices for in camera review.
Significance
- Establishes that grand jury secrecy is not absolute; defendants have access rights under certain circumstances
- Now supplemented by Fed. R. Crim. P. 26.2 (Jencks Act), which requires production of prior statements of government witnesses after direct examination
- Brady and Giglio obligations also extend to grand jury testimony if it contains exculpatory or impeachment material
- Represents the balance between grand jury secrecy (necessary for institutional reasons) and defendant’s due process rights