Habeas corpus in the United States
In United States law, habeas corpus () is a recourse challenging the reasons or conditions of a person's confinement under color of law. A petition for habeas corpus is filed with a court that has jurisdiction over the custodian, and if granted, a writ is issued directing the custodian to bring the confined person before the court for examination into those reasons or conditions.
Source: Wikipedia — Habeas corpus in the United States (CC BY-SA 4.0)