The Writ of Habeas Corpus demands that requires a prisoner must go before the court to determine if there is lawful authority to detain the prisoner. The writ of habeas corpus primarily acts as a writ of inquiry, issued to test the reasons or grounds for restraint and detention.Criminal habeas corpus writs are procedures used to test the legality and correctness of a prisoner's detention. The writ of habeas corpus is a legal order requiring a person holding another person to produce that individual before a court or judge. The Habeas Corpus petition claims the arrest, sentence, or trial violated constitutional law, making imprisonment unlawful. Federal habeas corpus is a procedure under which a federal court may review the legality of an individual's incarceration. A writ of habeas corpus is a legal rule that gives a prisoner the right to request court assistance and show that they've been wrongfully imprisoned. A writ of habeas corpus is a petition filed with the court when a prisoner wishes to contest the legality of his imprisonment. United States Constitution, Article 1, § 9. Appeared in response to a summons or writ of habeas corpus.