Whether federal courts retain habeas jurisdiction under 28 U.S.C. § 2241 to review the lawfulness of post-removal-period immigration detention.
Holding
Yes. Section 2241 permits federal courts to hear statutory and constitutional challenges to detention after a final removal order.
Reasoning
The aliens were not seeking review of the Attorney General's discretionary decision whether to release them. They challenged a distinct legal question: whether § 1231(a)(6) gave the Attorney General authority to detain them under the circumstances. That question concerns the legal limits of executive power and is properly cognizable in habeas.
Congress had restricted judicial review in several immigration provisions, but none clearly withdrew habeas jurisdiction over claims that continued detention exceeds statutory authority. The Court therefore preserved habeas as the traditional means for testing the legality of executive detention after removal proceedings have ended.