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. Prisoners can sometimes use a petition for writ of habeas corpus to challenge the legality of a criminal conviction or inhumane prison conditions.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. The "Great Writ" of habeas corpus is a fundamental right in the Constitution that protects against unlawful and indefinite imprisonment. 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. This Chapter explains an important right—the writ of habeas corpus. What is "habeas corpus"? "Habeas corpus" is a Latin term meaning "bring us the body. Amendments, and renders him not eligible for a sentence of death. Yuma, La Paz, or Gila County, file your petition in the Phoenix Division.