A writ that is often used to bring a prisoner before the court to determine the legality of his imprisonment. A prisoner wanting to argue that there is not sufficient cause to be imprisoned would file a writ of habeas corpus. It may also be used to bring a person in custody before the court to give testimony, or to be prosecuted.

Statements by a witness who did not see or hear the incident in question but learned about it through secondhand information such as another’s statement, a newspaper, or a document. Hearsay is usually not admissible as evidence in court, but there are many exceptions to that rule.