Heller held that the Second Amendment protects an individual right to keep a firearm for lawful self-defense in the home. The Court struck down D.C.'s handgun ban and functional-storage rule, but it also said the right is not unlimited and did not question several longstanding categories of firearms regulation.
Heller worked as a special police officer in Washington, D.C. and was allowed to carry a handgun at work, but the District refused his application to register a handgun for his home. He challenged the handgun ban, the home licensing rule as applied to carrying a handgun at home, and the requirement that lawful firearms be kept unloaded, disassembled, or locked. The case asked the Court to resolve whether the Second Amendment protects an individual right to keep and bear arms or only a right tied to militia service.
Do D.C. laws that prohibit handgun registration and require lawful firearms in the home to be kept nonfunctional violate the Second Amendment right to keep and bear arms?
The Second Amendment protects an individual right to possess a firearm unconnected with militia service and to use that firearm for traditionally lawful purposes, including self-defense in the home. The District of Columbia's handgun ban and its requirement that lawful firearms in the home be kept nonfunctional violated that right.
How the justices lined up in this decision.
Heller transformed Second Amendment litigation by recognizing an individual constitutional right to possess a firearm for lawful self-defense in the home. It invalidated D.C.'s handgun ban and functional-storage rule, but it did not strike down all gun regulation. Legislatures and courts still evaluate laws such as bans on possession by felons, restrictions in sensitive places, and commercial-sale rules under later Second Amendment doctrine.
5-4. Justice Antonin Scalia wrote the majority opinion, joined by Chief Justice John G. Roberts, Jr. and Justices Anthony M. Kennedy, Clarence Thomas, and Samuel A. Alito, Jr. Justice John Paul Stevens dissented, joined by Justices David H. Souter, Ruth Bader Ginsburg, and Stephen G. Breyer. Justice Breyer filed a separate dissent, joined by Justices Stevens, Souter, and Ginsburg.