United States v  Dionisio Case Brief Summary | Law Case Explained @QuimbeeDotCom
United States v  Dionisio Case Brief Summary | Law Case Explained  @QuimbeeDotCom
Uploaded June 2025 | Updated September 2026, 2 weeks ago
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United States v. Dionisio | 410 U.S. 1, 93 S.Ct. 764, 35 L.Ed.2d 67 (1973)

Grand jury subpoenas can be used to secure testimony or documents. In United States versus Dionicio, the supreme court considered whether a grand jury subpoena could also be used to obtain other physical evidence.

A federal grand jury investigating unlawful gambling received wiretap voice recordings in evidence. The grand jury subpoenaed several people, including Antonio Dionisio, seeking to obtain recorded voice samples to compare with the recordings in evidence.

Amendment rights. The district court granted the government's petition to compel D'Onicio's compliance with the subpoena. After D'Annico still refused, he was found in contempt. The seventh circuit reversed, holding that the government had to make a preliminary showing of reasonableness before D'Annico could be compelled to provide physical evidence.

The United States Supreme Court granted cert.

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