The Court ruled that Guantanamo detainees have the constitutional right to seek habeas corpus review in federal court. Congress could not replace habeas with a limited review process that did not let detainees meaningfully challenge the basis for their detention.
After Rasul and Hamdan, Congress passed laws limiting court review for Guantanamo detainees. Boumediene challenged the Military Commissions Act's removal of habeas jurisdiction and the adequacy of the substitute review process.
Does the Suspension Clause protect noncitizen detainees held at Guantanamo Bay, and did Congress provide an adequate substitute for habeas corpus when it stripped federal courts of habeas jurisdiction?
Foreign nationals detained at Guantanamo Bay have the constitutional privilege of habeas corpus under the Suspension Clause. Section 7 of the Military Commissions Act unconstitutionally suspended that privilege because the Detainee Treatment Act review process was not an adequate substitute for habeas review.
How the justices lined up in this decision.
Boumediene preserved federal court review for Guantanamo detainees and limited Congress's ability to remove habeas jurisdiction without a valid suspension or an adequate substitute. It did not decide that the detainees had to be released, only that they could challenge their detention through meaningful habeas proceedings.
Justice Kennedy wrote for a five-justice majority joined by Justices Stevens, Souter, Ginsburg, and Breyer. Justice Souter concurred, joined by Justices Ginsburg and Breyer. Chief Justice Roberts dissented, and Justice Scalia dissented in an opinion joined by Chief Justice Roberts and Justices Thomas and Alito.