An officer may enter a home without a warrant [or consent] if he has “an objectively reasonable basis for believing that an occupant is seriously injured or imminently threatened with such injury.”
William Case v. Montana
Supreme Court of the United States
January 14, 2026
Why is Mr. Case’s case important?
William Case v. Montana is a significant U.S. Supreme Court decision that clarifies the Fourth Amendment’s application to warrantless police entries into homes for the purpose of providing emergency aid, particularly in situations involving potential suicide or imminent harm. This decision is especially timely given ongoing debates about mental health crises, police responses to welfare checks, and the balance between public safety and individual rights. This decision provides strong support for law enforcement to enter a home if officers can establish there is an actual and on-going emergency inside a home where someone may be in danger. The decision provides clearer guidance for law enforcement, courts and policymakers, potentially reducing litigation over similar incidents and influencing how states handle suicide threats or domestic emergencies.
Mr. William Case Threatens Suicide
This case began with an alarming phone call—from petitioner Mr. William Case to his ex-girlfriend J. H., both residents of a small town in Montana. Mr. Case told J. H. on the call that “he was going to kill himself.” Because Mr. Case sounded “erratic,” J. H. assumed he had been drinking. Ibid. She tried to talk Mr. Case out of committing suicide, but “couldn’t reel him back”: With each passing moment, Mr. Case “became more methodical about what he was going to do.” Id., at 68. Mr. Case said that he was “going to get a note”—presumably meaning a suicide note, for J. H. or others to find. Ibid. And then J. H. heard a “clicking” sound, like the “cock[ing of] a gun.” Ibid. J. H. told Mr. Case she was going to call the police, but that seemed only to antagonize him: Mr. Case replied “he would shoot them all too.” Id., at 69. Finally, J. H. heard “a pop” followed by “nothing”—“just dead air.” Ibid. She “yelled [Mr. Case’s] name a few times,” but got no response, leading her to think he had “pulled the trigger.” Ibid. So she called 9–1–1 to report the incident and drove as fast as she could to Mr. Case’s home.
Mr. Case had a history of alcohol abuse and mental-health issues.
Mr. Case did not answer the door.
Three police officers, dispatched to do “a welfare check on a suicidal male,” met J. H. outside the house at 307 West Commercial Avenue, Anaconda, Montana. Id., at 104 (testimony of officer). They decided the situation was “very serious,” based both on what J. H. told them about the call and on what they already knew about Mr. Case. The officers were aware that Mr. Case had a history of alcohol abuse and mental-health issues; that he had previously threatened suicide at the school where he worked; and that he had once seemed to attempt “suicide-by-cop,” by confronting the police in a way that was likely to provoke a lethal response. So the three officers requested that the chief of police come to the scene. While waiting for him, they circled the house looking for signs of injury or danger. They knocked on the doors and yelled into an open window, but got no response. Shining their flashlights inside, they could make out empty beer cans, an empty handgun holster, and a notepad with writing on it, which they took to be the suicide note Mr. Case had mentioned to J. H. At that point, however, they saw no sign of Mr. Case.
Mr. Case was hiding inside 307 West Commercial Avenue, Anaconda, Montana and refused commands to answer the door. Did law enforcement cross the threshold of the doorway lawfully?
Chief Bill Sather Arrives
Once the chief came, the officers conferred and decided to enter the house “to render emergency aid.” Id., at 198. In the best-case scenario, they hoped to “talk [Mr. Case] down” and prevent any injury. But given J. H.’s account, the officers considered as well another possibility—that Mr. Case had already shot himself and might be “in there bleeding.” At the same time, they worried that if Mr. Case remained unharmed, their entry could spark a confrontation. So they equipped themselves with long-barrel guns and a ballistic shield before going in.
Officers Enter the Home – Mr. Case was Holding a Black Object and was Shot
The officers entered the house through the front door, about 40 minutes after they first arrived. They announced themselves loudly, and continued to call out as they walked through the home. Mr. Case did not answer; he was hiding in the closet of a bedroom upstairs. When one of the officers entered that room, Mr. Case threw open the closet curtain and appeared from behind it, holding “a black object” which looked like a gun. Id., at 194. Fearing that he was about to be shot, the officer fired his own rifle. The bullet hit Mr. Case in the abdomen, and another officer rushed to administer first aid. An ambulance was called to take Mr. Case to the nearest hospital (where he recovered). Meanwhile, one of the officers found a handgun in a laundry basket next to the place where Mr. Case had stood.
Trial Court Determines the Entry was Lawful Because the Officers Entered for an Emergency
The county attorney charged Mr. Case with assaulting a police officer. Mr. Case moved to suppress all evidence obtained as a result of the home entry, arguing that the police had violated the Fourth Amendment by coming into his house without a warrant. The trial court denied the motion on the ground that the police officers were responding legitimately to an “emergency.” A Montana jury then found Mr. Case guilty of the crime charged.
Montana Supreme Court Upholds the Trial Court – Entry was Lawful
On appeal, a divided Montana Supreme Court upheld the trial court’s ruling that the officers’ entry was lawful. The majority analyzed the issue under its “community care-taker doctrine.” 553 P. 3d 985, 990 (Mont. 2024). It noted that a recent Fourth Amendment decision of this Court, Caniglia v. Strom, 593 U. S. 194, 198 (2021), had rejected a “community caretaking rule” allowing a warrantless home entry even absent a “need to render emergency assistance” to an occupant. But the Montana court thought its community-caretaker doctrine survived that holding because it demanded such an emergency. Under that doctrine, the court explained, police could enter a home to do a “welfare check” only when “objective, specific and articulable facts” would lead an “experienced officer [to] suspect” that a person in-side “is in need of help or is in peril.” 553 P. 3d, at 990, 991. And the court found that facts meeting that description existed here because of the likelihood of suicide. See id., at 994. The court rejected Mr. Case’s alternative standard: that a police officer must have “probable cause to believe” the occupant in need of emergency aid. Id., at 992. The “probable cause” locution, the court suggested, applies only when the police are “engaged in a criminal investigation.” Ibid. The dissenting justices, by contrast, favored the proposed probable cause rule, which they concluded the officers here did not satisfy. See id., at 996, 998 (opinion of McKinnon, J.). In the dissent’s view, the court’s different approach resembled the “mere reasonable suspicion” standard applicable to comparatively non-invasive street stops. Id., at 999. That standard, the dissent thought, was too easily met to support a warrantless entry into a home. See id., at 996, 999.
Unpersuaded Mr. Case Makes a Federal Case Out of his Case
U.S. Supreme Court Accepts his Case
We granted certiorari, 605 U. S. 968 (2025), because courts have differed on whether police officers entering a home to provide emergency aid need “probable cause” to believe that an occupant is in peril. We conclude that standard, borrowed from the criminal context, is inapt. We in-stead hold just what we have held before: that the officers may enter if, but only if, they have an “objectively reasonable basis for believing” that an occupant faces serious danger. Brigham City, 547 U. S., at 400.
Established Case Law – Crossing the Threshold
The Fourth Amendment provides that “[T]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated.” At the “very core” of that guarantee, as this Court has often stated, “stands the right of a man to retreat into his own home and there be free from unreasonable governmental intrusion.” Caniglia, 593 U. S., at 198 (quoting Florida v. Jardines, 569 U. S. 1, 6 (2013)). When the intrusion is into that most private place, “reasonableness” usually means having a warrant. Brigham City, 547 U. S., at 403 (“It is a basic principle of Fourth Amendment law that searches and seizures inside a home without a warrant are presumptively unreasonable”). “But not always: The warrant requirement is subject to certain exceptions.” Lange v. California, 594 U. S. 295, 301 (2021). And among those is one pertinent here, involving the need to provide an occupant with emergency aid.
Established Case Law – Exigent Circumstance for Danger Inside the Home
This Court first approved a warrantless home entry to render emergency assistance in Brigham City. There, police officers responding to a noise complaint observed through a kitchen window a physical altercation between an adolescent and several adults. As they watched, the teenager punched one of the adults in the face, “sending [him] to the sink spitting blood.” 547 U. S., at 406. The officers immediately entered the home through a nearby screen door and, announcing their presence, caused the fight to cease. We unanimously approved the warrantless entry as “reasonable under the circumstances.” Ibid. And we explained what made it so: The officers had “an objectively reasonable basis for believing that an occupant [was] seriously injured or imminently threatened with such injury.” Id., at 400.
Legal Standard – Objectively Reasonable Basis
Three years later, in Michigan v. Fisher, we reiterated what we had said in Brigham City about the “emergency aid exception.” 558 U. S. 45, 47 (2009). The police in Fisher, also responding to a neighbor’s report, found a scene redolent of violence and danger. Three windows were broken, with the glass strewn on the ground out-side; blood was smeared on one of the doors, as well as on the smashed-in hood of a pickup truck in the driveway; and, visible through a window, a man inside the house was “screaming and throwing things” at an unseen target. Id., at 48. We held that the officers’ entry in those circumstances was “reasonable under the Fourth Amendment,” just as it had been in Brigham City. 558 U. S., at 48. Using the same standard articulated there, we concluded that the officers had “an objectively reasonable basis for believing” that an occupant of the home needed immediate aid. Id., at 47 (quoting Brigham City, 547 U. S., at 406).
Established Case Law – Community Caretaking Doctrine
Finally, in Caniglia, we reaffirmed Brigham City even as we rejected a broader “community caretaking” justification for warrantless home entries. The police had gone to Edward Caniglia’s home after his wife reported that he was suicidal. Caniglia spoke with the officers on his front porch and agreed to go to a hospital for psychiatric testing. Then, once he had left, the officers went inside and took away two handguns he owned. The lower courts approved the entry on the ground that the officers were performing “community caretaking functions.” 593 U. S., at 196. But we declined to recognize such an “open-ended license” for law enforcement officers to enter private homes. Id., at 199. Citing Brigham City, we readily acknowledged that officers may enter a home to “render emergency assistance to an injured occupant or to protect an occupant from imminent injury.” 593 U. S., at 198. But such emergency conditions were indeed necessary and, given the facts, the officers had never tried to defend their entry on that basis.
Montana Supreme Court the Right Conclusion with the Wrong Analysis
The Montana Supreme Court’s opinion strayed from the Fourth Amendment rule that trio of decisions sets out. To begin with, the court’s use of “community caretaker” doctrine was ill-advised, given that Caniglia contrasted “community caretaking” with “render[ing] emergency assistance” and concluded that the former cannot alone justify a warrantless home entry. Ibid. The Montana court, to be sure, tried to reconcile its approach with Caniglia by depicting its community-caretaker rule as allowing home entries only in emergencies. See 553 P. 3d, at 991. But using terminology that this Court has held misplaced in home-entry cases could serve only to confuse the issue. And yet more fundamental, the emergency-aid test incorporated in Montana’s caretaker doctrine is different from the one adopted in Brigham City. As noted above, Montana’s test finds a home entry “reasonable” when an officer has “specific and articulable facts” from which to “suspect” that someone needs help. 553 P. 3d, at 991; see supra, at 4. That test’s language, as the dissenting justices noted, evokes the Fourth Amendment standard applying to brief, investigative street stops: “reasonable suspicion” based on “specific and articulable facts.” United States v. Sokolow, 490 U. S. 1, 7 (1989); Terry v. Ohio, 392 U. S. 1, 21 (1968); 553 P. 3d, at 999 (McKinnon, J.). But Brigham City did not adopt Terry’s reasonable-suspicion standard for home entries, as both the State of Montana and the United States as amicus curiae acknowledge. Rather, Brigham City formulated its own standard for dealing with household emergencies—again, whether an officer has “an objectively reasonable basis for believing” that an occupant is seriously injured or imminently threatened with such harm. 547 U. S., at 400.
Mr. Case Proposes the Probable Cause Standard Replace Objectively Reasonable Standard to Enter a Home for an Emergency
Mr. Case, however, wants something more. He recognizes that the Brigham City test applies here, and that it has had but one formulation: In describing and applying that standard, we have never used any different terms. But still, Mr. Case urges us now to understand the Brigham City test as “sound[ing] in probable cause.” What the test really requires, Mr. Case contends, is that police officers “have probable cause to believe [an occupant is] seriously injured or imminently threatened with such injury.” Mr. Case reaches that conclusion based mainly on the Fourth Amendment’s recognition of the “sanctity of the home.” Id., at 29. Given that special status, he argues, a home entry’s aid-giving, “noninvestigatory purpose” should make no difference: The same probable-cause principles used in deciding whether “criminal activity [is] afoot” should apply as well in “assessing the risk and gravity of an emergency.”
Established Case Law – Probable Cause and Home Entry
We decline Mr. Case’s invitation to put a new probable-cause spin onto Brigham City. “[T]he probable-cause standard,” this Court has often stated, “is peculiarly related to criminal investigations.” Treasury Employees v. Von Raab, 489 U. S. 656, 667 (1989) (quoting Colorado v. Bertine, 479 U. S. 367, 371 (1987)). The standard’s history is “rooted” in the “criminal investigatory context.” O’Connor v. Ortega, 480 U. S. 709, 723 (1987) see Henry v. United States, 361 U. S. 98, 100–102 (1959). And the standard has acquired meaning over time by virtue of that context, as judges have assessed, in case after case, the requisite likelihood of finding criminal contraband or evidence. See, e.g., Illinois v. Gates, 462 U. S. 213, 238–239 (1983). The resulting body of law would fit awkwardly, if at all, in the non-criminal, non-investigatory setting at issue here. So Brigham City adopted a different approach. Rather than strain to relate probable cause decisions to emergency-aid situations, we asked simply whether an officer had “an objectively reasonable basis for believing” that his entry was direly needed to prevent or deal with serious harm. 547 U. S., at 400. In adhering to that question, we respect as ever the “first among equals” status the Fourth Amendment affords the home. Jardines, 569 U. S., at 6; see Caniglia, 593 U. S., at 198–199. And in that vein, we note that an emergency-aid entry provides no basis to search the premises beyond what is reasonably needed to deal with the emergency while maintaining the officers’ safety. But we assess the reasonableness of that limited entry on its own terms, rather than through the lens generally used to consider investigative activity.
If Mr. Case had already shot himself, he could have been severely injured and in need of immediate medical care.
Doing so here yields a ready conclusion: The officers had, as Brigham City requires, an “objectively reasonable basis for believing” that their intervention was needed to prevent serious harm. As earlier described, the officers knew first-hand that Mr. Case suffered from mental-health and alcohol-abuse problems, and that he had previously talked about committing suicide. See supra, at 2. When they reached Mr. Case’s house, they learned about J. H. and Mr. Case’s just- concluded phone call—that Mr. Case, in an apparently inebriated state, threatened to kill himself, spoke of preparing a suicide note, and quite possibly cocked or even shot a gun before the line went dead. The concerns that call raised were heightened by what the officers could see through the windows—empty beer cans, an empty holster, and a note-pad—as well as by Mr. Case’s failure to respond to their urgent knocking. If Mr. Case had already shot himself, he could have been severely injured and in need of immediate medical care. And if he had not, the risk of suicide remained acute, given all the facts then known to the officers. It was thus objectively reasonable for the police to believe that Mr. Case needed emergency aid.
Mr. Case concludes that if the officers had only left well enough alone, nothing would have happened.
Mr. Case counters that only the police entry itself created a “likely danger.” His argument turns on the prospect of suicide-by-cop. As noted earlier, Mr. Case had once before acted in a way seemingly designed to provoke a lethal police response, as the officers knew. And J. H. told the officers that Mr. Case had threatened to “shoot them all too” if they came to the scene. Ibid. So the “main risk the officers objectively faced,” Mr. Case posits, was that “their very entry would induce” a shoot-out, leading to a “suicide-by-cop.” And indeed, Mr. Case contends, the officers knew that: Why else would they have “waited roughly 40 minutes after their arrival” before entering his home? Mr. Case concludes that if the officers had only left well enough alone, nothing would have happened.
[T]here is no basis for thinking that the officers would have gone into Mr. Case’s home just so he could instigate a gunfight.
But Mr. Case much oversimplifies a complex situation. The objective reasonableness of an officer’s conduct under Brigham City, as in other Fourth Amendment contexts, is evaluated by looking at the “totality of the circumstances.” E.g., Barnes v. Felix, 605 U. S. 73, 80 (2025); Ohio v. Robinette, 519 U. S. 33, 39 (1996). One of those circumstances was no doubt that Mr. Case could provoke a confrontation. As noted earlier, that was partly why the officers called the police chief to the scene and why they carefully considered protective measures—leading to some delay in their entry. But there is no basis for thinking that the officers would have gone into Mr. Case’s home just so he could instigate a gunfight. The circumstances making their entry reasonable, as just stated, were those suggesting that Mr. Case may already have shot himself or would do so absent intervention. The statements Mr. Case made to J. H. plus the visual evidence corroborating them indicated that Mr. Case wanted to end his life. The decision of the officers to enter his home to prevent that result—even at some significant risk to themselves—was (at the least) reasonable. The Fourth Amendment did not require them, as Mr. Case now argues, to leave him to his fate.
Conclusion and Holding
We repeat today what we have held before: An officer may enter a home without a warrant if he has “an objectively reasonable basis for believing that an occupant is seriously injured or imminently threatened with such injury.” Brigham City, 547 U. S., at 400. The officers’ entry satisfied that test. Accordingly, we affirm the judgment (even though not all the reasoning) of the Montana Supreme Court.
Information for this article was obtained from the Clerk of the Montana Supreme Court, Case v. Montana, No. 23-0136 [Montana Supreme Court] and William Case v. Montana, 607 U.S. ____ (2026).
William Case v. Montana, 607 U.S. ____ (2026) was issued January 14, 2026 by the U.S. Supreme Court and is binding throughout the United States.
Lessons Learned
- Objectively Reasonable – Mr. Case had argued that law enforcement should require probable cause to enter a home for an Exigent Circumstance – Danger Inside the Home. However, on May 22, 2006 the U.S. Supreme issued Brigham City v. Stuart, 547 U.S. 398 (2006) and held “[T]he officers had an objectively reasonable basis for believing that both the injured adult might need help and that the violence in the kitchen was just beginning.”. So, in the Brigham City case, the court established the legal doctrine to enter was an ‘objectively reasonable’ basis. Mr. Case lost his argument that probable cause is the standard for law enforcement to enter a home for a person who is danger inside. The probable cause standard applies to criminal investigations, but it did not apply here because, at the moment the officers crossed the threshold, they were not conducting a criminal investigation they entered the home to render aid. The correct standard for entering a home to render emergency aid to a person in danger is whether the officers acted on an objectively reasonable basis based upon a totality of the circumstances.
- Suicide-by-Cop Does Not Require Officers to Disengage. The Fourth Amendment does not mandate that police “leave someone to his fate” when objective facts show a real and immediate danger to life. Welfare checks can quickly become use-of-force encounters. Training must integrate legal standards, tactical planning and crisis response to mentally unstable or suicidal individuals. The court supports this analysis “The circumstances making their entry reasonable, as just stated, were those suggesting that Mr. Case may already have shot himself or would do so absent intervention. The statements Mr. Case made to J. H. plus the visual evidence corroborating them indicated that Mr. Case wanted to end his life. The decision of the officers to enter his home to prevent that result—even at some significant risk to themselves—was (at the least) reasonable. The Fourth Amendment did not require them, as Mr. Case now argues, to leave him to his fate.”. So even if a person is inside his home threatening suicide, law enforcement does not have to disengage and may enter to ‘[P]revent that result.’. The U.S. Supreme Court established the decision unanimously 9-0!
- Delaying Entry Does Not Always Defeat the Exigency – When the initial officers arrived, they were unsure if they could enter or not. After knocking on the door and looking into the windows, the officers called Chief Bill Sather to the scene. After further contemplation the officers entered the home. The court noted this delay “The officers entered the house through the front door, about 40 minutes after they first arrived.”. Case argued that the delay defeated the exigency, however the U.S. Supreme Court determined otherwise “But Mr. Case much oversimplifies a complex situation. The objective reasonableness of an officer’s conduct under Brigham City, as in other Fourth Amendment contexts, is evaluated by looking at the “totality of the circumstances.” E.g., Barnes v. Felix, 605 U. S. 73, 80 (2025); Ohio v. Robinette, 519 U. S. 33, 39 (1996). One of those circumstances was no doubt that Mr. Case could provoke a confrontation. As noted earlier, that was partly why the officers called the police chief to the scene and why they carefully considered protective measures—leading to some delay in their entry. But there is no basis for thinking that the officers would have gone into Mr. Case’s home just so he could instigate a gunfight. The circumstances making their entry reasonable, as just stated, were those suggesting that Mr. Case may already have shot himself or would do so absent intervention.”. Taking time to call supervisors, plan tactics, and use protective equipment can support reasonableness rather than undermine it, especially when officers are balancing rescue with officer safety. Law enforcement should not apply a delay in entry will always be objectively reasonable, such as in applying the Fresh Pursuit Doctrine, where a delay be unreasonable because the fresh pursuit would become stale.
- Totality of the Circumstances. The entry of Mr. Case’s home was not singularly based on the phone call to his ex-girlfriend. Rather, the officers were aware of previous suicide threats, his mental-health history, the ex-girlfriend’s information he was intoxicated, corroborating physical evidence observed by the officers; beer cans and a written note, threats to the officers “he would shoot them all too.”, lack of response, and sudden silence on a phone call is a textbook example of ‘totality of the circumstances’. Consequently, law enforcement will require more than just a phone call to enter a home that someone inside is in danger. There must be additional information corroborating the phone call.
- Community Care Taking Doctrine – On May 17, 2021 the U.S. Supreme Court issued Caniglia v. Strom, 593 U.S. 194 (2021) and held that the Community Caretaking Doctrine could not be used to enter a home. The Community Caretaking Doctrine was initially established by the U.S. Supreme Court on June 21, 1973 when the court issued Cady v. Dombrowski, 413 U.S. 433 (1973). However Cady centered around the search of a vehicle that was abandoned roadside as the court explained “Local police officers … frequently investigate vehicle accidents in which there is no claim of criminal liability and engage in what, for want of a better term, may be described as community caretaking functions, totally divorced from the detection, investigation, or acquisition of evidence relating to the violation of a criminal statute.”. From Cady in 1973 until Caniglia in 2021 many lower courts, both state and federal courts applied the Community Caretaking Doctrine to enter homes. That argument was revisited in Case v. Montana. The Montana Supreme Court justified the officer’s entry into Mr. Case’s home based on the Community Caretaking Doctrine. However that was incorrect as noted by the U.S. Supreme Court “[T]he court’s use of “community caretaker” doctrine was ill-advised, given that Caniglia contrasted “community caretaking” with “render[ing] emergency assistance” and concluded that the former cannot alone justify a warrantless home entry.”. Therefore, law enforcement must establish that there is an actual and on-going emergency inside a home that someone is in danger and based on the totality of circumstances, may enter the home without a warrant or consent. For more on Caniglia v. Strom, 593 U.S. 194 (2021) see my article Can the Community Caretaking Doctrine Permit Law Enforcement to Cross the Threshold of a Residence?.
- Pre-Sent Arms! Chief Bill Sather, the unidentified officers, the prosecutors and the appellate attorneys should all be highly commended for the entry, arrest, conviction and appeal defense of Mr. William Case. Well done!
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Don’t let your training fail you!
Be safe, smart and objectively reasonable!