Habeas Corpus

Habeas corpus is Latin for "that you have the body." A writ of habeas corpus is a court order to whoever is holding a person in custody: bring the prisoner before the court and justify the detention, or let them go. It does not ask whether someone is guilty. It asks whether the government has a lawful basis to hold them at all. The Constitution protects it directly: the Suspension Clause says the "Privilege of the Writ of Habeas Corpus shall not be suspended, unless when in Cases of Rebellion or Invasion the public Safety may require it" (Art. I, sec. 9, cl. 2). In Boumediene v. Bush the Supreme Court held that the protection has real teeth, reaching detainees at Guantanamo and striking down a law that tried to strip the courts of habeas jurisdiction without a valid substitute.

• Boumediene v. Bush, 553 U.S. 723 (2008) ↗

Federal habeas runs through a handful of statutes, and the first requirement is custody: the person has to be held by the government to invoke it. Section 2241 of Title 28 is the general grant of habeas power to the federal courts and is the usual vehicle for challenging detention that is not a criminal sentence, including immigration detention. Section 2254 is the channel for a person in state custody to argue their confinement violates federal law, and Section 2255 is the parallel motion for a federal prisoner to attack their own sentence in the court that imposed it. Which statute applies decides which court hears the case and what the prisoner has to show.

Habeas is not a second appeal, and since 1996 the Antiterrorism and Effective Death Penalty Act (AEDPA) has made that explicit. For state prisoners, a federal court generally cannot grant relief unless the state court's decision was contrary to, or an unreasonable application of, clearly established Supreme Court law, which is a deliberately steep hill. AEDPA also sets a one-year clock and sharply restricts "second or successive" petitions, so a prisoner usually gets one shot and must clear a gate before filing again. Much of modern habeas litigation is really about these procedural locks: timeliness, exhaustion of state remedies, procedural default, and what counts as a successive petition.

There is a line between asking to be released and asking for money. If a win would necessarily mean a conviction or sentence is invalid, the prisoner's road is habeas, not a civil-rights damages suit. In Heck v. Humphrey the Supreme Court held that a person cannot bring a Section 1983 damages claim that would imply their conviction was unlawful unless that conviction has already been overturned. The practical point for viewers: the remedy you seek decides the door you walk through, and courts enforce that line hard.

• Heck v. Humphrey, 512 U.S. 477 (1994) ↗

A large share of today's habeas fights are about immigration custody, where a person detained by the government uses habeas to test whether the detention, or a removal carried out around it, is lawful. The Supreme Court has long treated habeas as the backstop here: in INS v. St. Cyr it read immigration statutes narrowly to avoid cutting off habeas review, because doing so would raise a serious Suspension Clause problem. The roots go back over a century to the Japanese Immigrant Case (Yamataya v. Fisher), where the Court recognized that even in immigration enforcement the government owes due process. Many of the cases we track below, from Abrego Garcia to the detention petitions, live in exactly this space.

• INS v. St. Cyr, 533 U.S. 289 (2001) ↗