opinion: Per Curiam.
  An Indiana jury convicted Joseph Corcoran of four counts of murder. Corcoran was sentenced to death. After Corcoran’s challenges to his sentence in the Indiana courts failed, he sought federal habeas relief. Corcoran argued in his federal habeas petition that: (1) the Indiana trial court committed various errors at the sentencing phase; (2) his sentence violated the Sixth Amendment; (8) Indiana’s capital sentencing statute was unconstitutional; (4) the prosecution committed misconduct at sentencing; and (5) he should not be executed because he suffers from a mental illness. See Corcoran v. Buss, 483 F. Supp. 2d 709, 719, 726 (ND Ind. 2007). The District Court granted habeas relief on Corcoran’s claim of a Sixth Amendment violation, and ordered the state courts to resentence Corcoran to a penalty other than death. Id., at 725-726. The District Court did not address Corcoran’s other arguments relating to his sentence, noting that they were “rendered moot” by the order that Corcoran be resentenced because of the Sixth Amendment violation. Id., at 734.
  The Seventh Circuit reversed the District Court’s Sixth Amendment ruling. Corcoran v. Buss, 551 F. 3d 703, 712, 714 (2008). Then, without mentioning Corcoran’s other sentencing claims, the Seventh Circuit remanded “with instructions to deny the writ,” stating that “Indiana is at liberty to reinstate the death penalty.” Id., at 714. Corcoran sought rehearing, arguing that the Court of Appeals should have allowed the District Court to consider his additional attacks on his sentence. But the Court of Appeals denied rehearing, again without referring to Corcoran’s undecided claims.
  We now grant certiorari and hold that the Seventh Circuit erred in disposing of Corcoran’s other claims without explanation of any sort. The Seventh Circuit should have permitted the District Court to consider Corcoran’s unresolved challenges to his death sentence on remand, or should have itself explained why such consideration was unnecessary.
  In its brief in opposition, the State argues that Corcoran’s claims were waived, and that they were in any event frivolous, so that a remand would be wasteful. Brief in Opposition 9-10. Nothing in the Seventh Circuit’s opinion, however, suggests that this was the basis for that court’s order that the writ be denied.
  The petition for certiorari and the motion for leave to proceed in forma pauperis are granted. The judgment of the Court of Appeals for the Seventh Circuit is vacated, and the case is remanded for further proceedings consistent with this opinion.
  It is so ordered.
choices: comity: civil rights comity: criminal procedure comity: First Amendment comity: habeas corpus comity: military comity: obscenity comity: privacy comity: miscellaneous comity primarily removal cases, civil procedure (cf. comity, criminal and First Amendment); deference to foreign judicial tribunals assessment of costs or damages: as part of a court order Federal Rules of Civil Procedure including Supreme Court Rules, application of the Federal Rules of Evidence, Federal Rules of Appellate Procedure in civil litigation, Circuit Court Rules, and state rules and admiralty rules judicial review of administrative agency's or administrative official's actions and procedures mootness (cf. standing to sue: live dispute) venue no merits: writ improvidently granted no merits: dismissed or affirmed for want of a substantial or properly presented federal question, or a nonsuit no merits: dismissed or affirmed for want of jurisdiction (cf. judicial administration: Supreme Court jurisdiction or authority on appeal from federal district courts or courts of appeals) no merits: adequate non-federal grounds for decision no merits: remand to determine basis of state or federal court decision (cf. judicial administration: state law) no merits: miscellaneous standing to sue: adversary parties standing to sue: direct injury standing to sue: legal injury standing to sue: personal injury standing to sue: justiciable question standing to sue: live dispute standing to sue: parens patriae standing standing to sue: statutory standing standing to sue: private or implied cause of action standing to sue: taxpayer's suit standing to sue: miscellaneous judicial administration: jurisdiction or authority of federal district courts or territorial courts judicial administration: jurisdiction or authority of federal courts of appeals judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from federal district courts or courts of appeals (cf. 753) judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from highest state court judicial administration: jurisdiction or authority of the Court of Claims judicial administration: Supreme Court's original jurisdiction judicial administration: review of non-final order judicial administration: change in state law (cf. no merits: remand to determine basis of state court decision) judicial administration: federal question (cf. no merits: dismissed for want of a substantial or properly presented federal question) judicial administration: ancillary or pendent jurisdiction judicial administration: extraordinary relief (e.g., mandamus, injunction) judicial administration: certification (cf. objection to reason for denial of certiorari or appeal) judicial administration: resolution of circuit conflict, or conflict between or among other courts judicial administration: objection to reason for denial of certiorari or appeal judicial administration: collateral estoppel or res judicata judicial administration: interpleader judicial administration: untimely filing judicial administration: Act of State doctrine judicial administration: miscellaneous Supreme Court's certiorari, writ of error, or appeals jurisdiction miscellaneous judicial power, especially diversity jurisdiction