Caetano v. Massachusetts
The Supreme Court threw out a Massachusetts high court ruling that upheld a total ban on stun guns, finding that every reason the state court gave for excluding stun guns from Second Amendment protection contradicted the Court's earlier decision in District of Columbia v. Heller.
The case is sent back to the Massachusetts courts to reconsider the stun-gun ban under the correct constitutional standard, which protects modern weapons even though they didn't exist at the country's founding.
“the Second Amendment extends, prima facie, to all instruments that constitute bearable arms, even those that were not in existence at the time of the founding”
The Court's core reminder that Second Amendment protection isn't limited to founding-era weapons.
How it got here: A Massachusetts trial court convicted Caetano and the state's highest court affirmed, rejecting her Second Amendment defense; she asked the Supreme Court to review that ruling.
The Case in Depth
What happened
Jaime Caetano, a domestic violence survivor, carried a stun gun given to her by a friend for self-defense against an abusive ex-boyfriend after restraining orders failed to protect her. She was later arrested and convicted under a Massachusetts law that flatly bans possessing stun guns, after police found the weapon in her purse during an unrelated shoplifting investigation.
The question before the Court
Could Massachusetts ban stun guns outright by reasoning that they didn't exist when the Second Amendment was written?
Why it matters
People who want nonlethal self-defense options like stun guns and Tasers gain stronger constitutional footing, since states can't dismiss such weapons from Second Amendment protection simply because they're modern inventions or aren't used by the military. States with stun-gun bans may need to revisit those laws.
What changes now
The case returns to the Massachusetts courts, which must reconsider whether the stun-gun ban survives the Second Amendment using the correct legal standard from Heller. The Supreme Court did not itself decide whether the ban is unconstitutional — it only ruled that the lower court's reasoning was wrong, leaving the ultimate outcome for further proceedings in Massachusetts.
What this does not decide
The per curiam opinion does not decide whether Massachusetts's stun-gun ban is actually unconstitutional. It only holds that the state court's specific reasons for upholding the ban were legally flawed, and sends the case back for the lower court to apply the correct standard.
Concurrences and dissents
Concurrence — Justice Alito
Justice Alito, joined by Justice Thomas, agreed the judgment below must be vacated but argued the Court should have gone further and held outright that Massachusetts's stun-gun ban violates the Second Amendment. He detailed Caetano's story of self-defense against an abusive ex-boyfriend, criticized the state court's 'dangerous and unusual' analysis as flawed on both prongs, and stressed that stun guns are widely owned nonlethal self-defense tools that cannot be categorically banned.
How the Court got there
The legal reasoning, step by step
- The Court measured the Massachusetts court's reasoning against Heller's rule that the Second Amendment covers all bearable arms, even ones that did not exist when the Amendment was adopted in 1789, rejecting any test based on what weapons were common at the founding.
- The state court's first reason for excluding stun guns—that they weren't in common use in 1789—directly contradicted that rule, since Heller had already rejected limiting protection to founding-era weapons.
- The state court's second reason, that stun guns are 'unusual' because they are modern, was really the same common-use-in-1789 argument restated, so it failed for the same reason.
- The state court's third reason, that stun guns aren't readily adaptable to military use, also failed because Heller had specifically rejected the idea that only weapons useful in warfare receive Second Amendment protection.
- Having found all three justifications inconsistent with Heller, the Court concluded the Massachusetts court's legal analysis could not support its decision to uphold the stun-gun ban.
Doctrinal impact
Cases affected by this decision
Reaffirms District of Columbia v. Heller (554 U. S. 570)
The Court relied on Heller's rules to show the Massachusetts court misapplied Second Amendment doctrine.