This practice advisory is an introduction to the law of habeas corpus in the immigration context. This Chapter discusses how the writ of habeas corpus is applied in three states: Florida, New York, and Michigan.What is Habeas Corpus? During just about any conversation with a civil liberties advocate or constitutional lawyer, the concept of habeas corpus will likely come up. If the petitioner loses in the superior. The court must rule on a petition for writ of habeas corpus within 60 days after the petition is filed. A claim might be related to the conviction(s), the sentence(s), or both.