The writ of habeas corpus is the remedy to be used when any person is restrained in his liberty. What Is Habeas Corpus?I am the Petitioner in this Petition for Writ of Habeas Corpus. In Texas, the state writ of habeas corpus is a legal mechanism that allows individuals to challenge their detention or imprisonment. A Writ of Habeas Corpus (Latin for "that you have the body") may be filed on behalf of a person who is unlawfully imprisoned. An application for a Writ of Habeas Corpus is filed when a person seeks relief from unlawful detention or imprisonment. A writ of habeas corpus is a legal tool used to enforce a superior right of possession to a child. An application for a writ of habeas corpus asks a court to overturn your conviction because of a state or federal constitutional violation. An application for a writ of habeas corpus asks a court to overturn your conviction because of a state or federal constitutional violation. Please carefully read through all the steps listed below before you begin.