More than a dozen firearms companies are asking the Supreme Court to throw out a lawsuit that holds them responsible for a 2022 shooting carried out by a man who bought their products, a case that could reshape how far liability stretches in third-party violence.

The petition, docketed as Daniel Defense v. Lowy (No. 26-60), challenges a Fourth Circuit ruling that revived the lawsuit after a lower federal court had dismissed it. Attorney Erin Murphy filed the petition on behalf of the companies, arguing that the plaintiffs, Karen Lowy and her teenage daughter, are trying to hold manufacturers accountable for violence they had no hand in carrying out. The Supreme Court has requested a response, the Daily Caller reported, with a deadline of September 25, 2026.

The case traces back to April 2022, when Raymond Spencer opened fire from an apartment on the 2900 block of Van Ness Street Northwest in Washington D.C., firing more than 200 rounds in the direction of a nearby school. Four people were wounded. Spencer then committed suicide. Washington's Metropolitan Police Department identified him as the deceased suspect.

Karen Lowy was among the wounded. She had been picking up her 13-year-old daughter from the school when the shooting began. Both suffered physical and emotional injuries. Rather than pursue the estate of the man who pulled the trigger, Spencer was dead, Lowy and her daughter sued more than a dozen firearms manufacturers and related companies, naming anyone who made a firearm or firearm-related product that Spencer had purchased.

A federal district court tossed the case, then the Fourth Circuit brought it back

A federal district court dismissed Lowy's lawsuit. But the U.S. Court of Appeals for the Fourth Circuit reversed that decision and sided with her, keeping the case alive. The companies then escalated the fight to the Supreme Court, filing their petition on July 10, 2026.

The petition frames the dispute as a straightforward question of constitutional standing under Article III, the provision that limits federal courts to hearing actual cases and controversies. At issue is a legal concept called "traceability": whether a plaintiff can establish that the defendant's conduct, rather than the independent actions of a third party, caused the injury.

The petition lays out the companies' core argument in blunt terms:

"Lowy and her daughter filed a lawsuit seeking compensation for the physical and emotional injuries Spencer visited upon them. But they sought that recompense from parties that had no involvement in Spencer's shooting spree: They named as defendants more than a dozen manufacturers of legal and widely owned firearms and related products, covering anyone who manufactures a firearm or related product that Spencer purchased."

That argument gets at a principle that extends well beyond firearms. If a manufacturer of a legal, widely sold product can be hauled into court every time a buyer commits a crime with that product, the implications ripple across entire industries. The companies are not accused of selling illegally. They are not accused of negligence in a sale. They are accused of making products that a criminal chose to buy and then misuse.

Six federal circuits split three ways on when manufacturers can be sued

The petition's strongest card may be the circuit split. Federal appeals courts are divided evenly, three against three, on the standard for traceability when a third party, not the defendant, directly caused the plaintiff's harm. The companies argue this disagreement alone justifies Supreme Court review.

The Fifth, Sixth, and Eleventh Circuits all require a plaintiff to show that the defendant's conduct had a "determinative or coercive effect" on the third party who actually caused the injury. That is a high bar. It means the plaintiff must demonstrate that the manufacturer's actions essentially drove or compelled the criminal's behavior.

The Supreme Court has already agreed to hear other major Second Amendment cases in recent terms, including an AR-15 ban challenge that could reshape the legal landscape around firearms regulation.

The Fourth Circuit, in the Lowy case, rejected that demanding standard. Instead, it adopted the approach used by the Second Circuit: traceability is satisfied as long as a plaintiff can plausibly allege that the defendant's conduct had "some kind of 'predictable effect'" on the person who caused the injury. After the Fourth Circuit's ruling, the Ninth Circuit adopted the same looser standard.

The petition spells out the divide:

"There is thus now a 3-3 split on the appropriate standard for determining whether traceability is satisfied in cases where someone other than the defendant bears direct responsibility for the plaintiff's injuries."

A 3-3 circuit split is exactly the kind of disagreement the Supreme Court exists to resolve. Depending on where a case is filed, manufacturers of legal products face radically different standards for whether they can even be sued. A gun maker in Texas enjoys one set of rules; the same company selling the same product in Virginia faces another.

NSSF moves to back the companies with an amicus brief

The National Shooting Sports Foundation, the firearms industry's leading trade group, has petitioned the Supreme Court for permission to file an amicus brief supporting the companies. NSSF did not immediately respond to a request for comment. Neither did Murphy, the attorney who filed the petition.

The case also arrives at a moment when the Court's Second Amendment docket is unusually active. The justices have accepted two assault weapons ban cases that could produce landmark rulings on the scope of the right to keep and bear arms. How the Court handles manufacturer liability in Daniel Defense v. Lowy could set the boundaries for an entirely separate front in firearms litigation.

Meanwhile, at the state level, legislatures have been testing their own approaches. The Court recently declined to block a New York law that exposes gun makers to state liability suits, a decision that left the industry facing a patchwork of legal exposure depending on jurisdiction.

The "predictable effect" standard adopted by the Fourth Circuit is especially concerning for manufacturers because of how low it sets the threshold. Under that framework, a company that makes a legal product, sells it through lawful channels, and has no relationship with the eventual criminal buyer can still face litigation if a plaintiff argues that the company's general business conduct, manufacturing and marketing firearms, had some foreseeable connection to the harm. That standard could swallow the distinction between making a product and misusing it.

September 25 deadline puts the case on the Court's fall calendar

The Supreme Court's response deadline of September 25, 2026, means the justices could decide whether to take the case before the end of the year. If they grant certiorari, oral arguments would likely follow in the Court's current or next term, with a decision that would bind every federal circuit.

The institutional pressures on the Court are real. The justices have told Congress they need dramatically more funding as their caseload and security demands grow. A high-profile firearms liability case would only add to the spotlight.

Rob Romano, who tracks Second Amendment cases on X under the handle @2Aupdates, flagged the docket entry on August 26, noting the response had been requested. The case has drawn attention from firearms-law observers who see it as a potential vehicle for the Court to settle a question that has divided the circuits for years.

What makes this case distinct from many gun-control legal battles is that it is not about the right to own a firearm. It is about whether companies that make legal products can be forced to defend themselves in court, and potentially pay damages, when a criminal misuses those products. The shooter is dead. The companies did not sell to him directly, did not market to him specifically, and are not accused of breaking any law. The only connection between the defendants and the shooting is that Spencer bought products they manufactured.

Karen Lowy and her daughter suffered real harm. No one disputes that. But the legal question is whether the companies that made the firearms bear any constitutional responsibility for what a lone criminal did with them, or whether Lowy's lawsuit fails to meet the basic threshold for standing in a federal court.

If the Supreme Court adopts the looser "predictable effect" standard, every manufacturer of every legal product used in a crime could face the same exposure. If it adopts the stricter "determinative or coercive effect" test, plaintiffs will need to show that a company did something more than simply make and sell a lawful product. The stakes extend far beyond firearms.

When courts let sympathy for victims override the basic question of who actually caused the harm, the law stops being a shield and starts being a weapon aimed at lawful commerce itself.