Witness immunity from prosecution occurs when a

prosecutor A prosecutor is a legal representative of the prosecution in states with either the adversarial system, which is adopted in common law, or inquisitorial system, which is adopted in Civil law (legal system), civil law. The prosecution is the ...

agrees not to prosecute a

witness In law, a witness is someone who, either voluntarily or under compulsion, provides testimonial evidence, either oral or written, of what they know or claim to know. A witness might be compelled to provide testimony in court, before a grand jur ...

in exchange for

testimony Testimony is a solemn attestation as to the truth of a matter. Etymology The words "testimony" and "testify" both derive from the Latin word ''testis'', referring to the notion of a disinterested third-party witness. Law In the law, testimon ...

or production of other

evidence Evidence for a proposition is what supports the proposition. It is usually understood as an indication that the proposition is truth, true. The exact definition and role of evidence vary across different fields. In epistemology, evidence is what J ...

. In the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

, the prosecution may grant immunity in one of two forms. Transactional immunity, colloquially known as "blanket" or "total" immunity, completely protects the witness from future prosecution for crimes related to his or her testimony. Use and derivative use immunity prevents the prosecution only from using the witness's own testimony or any evidence derived from the testimony against the witness. However, if the prosecutor acquires evidence substantiating the crime independently of the witness's testimony, the witness may then be prosecuted. Prosecutors at the state level may offer a witness either transactional or use and derivative use immunity, but at the federal level, use and derivative use immunity is much more common. In the United States, Congress can also grant criminal immunity (at the Federal level) to witnesses in exchange for testifying.

Grand jury testimony in the United States

Witnesses compelled by

subpoena A subpoena (; also subpœna, supenna or subpena) or witness summons is a writ issued by a government agency, most often a court, to compel testimony by a witness or production of evidence under a penalty for failure. There are two common types of ...

to appear before a

grand jury A grand jury is a jury empowered by law to conduct legal proceedings, investigate potential criminal conduct, and determine whether criminal charges should be brought. A grand jury may subpoena physical evidence or a person to testify. A grand ju ...

are entitled to receive immunity in exchange for their testimony. The grant of immunity impairs the witness's right to invoke the Fifth Amendment protection against self-incrimination as a legal basis for refusing to testify. Per , a witness who has been granted immunity but refuses to offer testimony to a federal grand jury may be held in

contempt In colloquial usage, contempt usually refers to either the act of despising, or having a general lack of respect for something. This set of emotions generally produces maladaptive behaviour. Other authors define contempt as a negative emotio ...

. In addition, grand jury witnesses may be prosecuted for

perjury Perjury (also known as forswearing) is the intentional act of swearing a false oath or falsifying an affirmation to tell the truth, whether spoken or in writing, concerning matters material to an official proceeding."Perjury The act or an insta ...

making false statements Making false statements () is the common name for the United States federal process crime laid out in Section 1001 of Title 18 of the United States Code, which generally prohibits knowingly and willfully making false or fraudulent statements, or ...

in their testimony. In '' Kastigar v. United States'', 406 U.S. 441 (1972), the

US Supreme Court The Supreme Court of the United States (SCOTUS) is the highest court in the federal judiciary of the United States. It has ultimate appellate jurisdiction over all Federal tribunals in the United States, U.S. federal court cases, and over Stat ...

confronted the issue of the type of immunity, use or transactional, constitutionally required to compel testimony. The Court ruled that the grant of use and derivative use immunity is sufficient. Despite ''Kastigar'', the type of immunity required to compel testimony depends on the law of the applicable jurisdiction. Many states, such as

New York New York most commonly refers to: * New York (state), a state in the northeastern United States * New York City, the most populous city in the United States, located in the state of New York New York may also refer to: Places United Kingdom * ...

, exceed the requirements of the

US Constitution The Constitution of the United States is the supreme law of the United States of America. It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constitut ...

by requiring transactional immunity to be accorded to compelled witnesses. In states in which defendants have a right to testify on their own behalf at a grand jury proceeding, waiver of immunity is a condition of that right.

References

{{Authority control Law of the United States American legal terminology Legal immunity United States Fifth Amendment self-incrimination case law

Grand jury testimony in the United States

See also

References