To obtain a writ of habeas corpus, you must show the court that you are in custody in violation of the Constitution or laws of the United States. 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.Habeas corpus is a procedural device to bring child custody matters before a court. The Habeas Corpus Act of 1867 expanded the authority of federal courts to issue writs of habeas corpus for state prisoners. Marcy now petitions for a writ of habeas corpus, arguing that due process demands his release. Habeas corpus Action :CU-00 598-. PHX-MTL-25W. Local Rule of Civil Procedure (LRCiv) 3.5(a) provides that habeas corpus petitions must be filed on the courtapproved form. The law in the area is an intricate weave of statute and case law. A Writ of Habeas Corpus is a motion which is filed most frequently to ensure that a Defendant's imprisonment or detention is not illegal. Records relating to admiralty, civil, common law and equity, habeas corpus, and criminal cases, 1900-68.