In Case v. Montana, the Supreme Court of the United States unanimously affirmed that police may enter a home without a warrant to provide emergency aid if they have an objectively reasonable basis to believe someone is in danger. The case arose after officers entered the residence of William Case following a report that he was suicidal, leading to a confrontation where Case was shot and subsequently charged with assault. The Court rejected Case’s argument that officers must meet a higher probable cause standard, noting that such a requirement is specific to criminal investigations rather than emergency assistance. Writing for the Court, Justice Kagan clarified that the Fourth Amendment does not require a "probable-cause spin" on existing emergency aid doctrines. While the Court upheld the entry, Justice Sotomayor authored a concurrence emphasizing that police should prioritize de-escalation during mental health crises to avoid unnecessary violence. Justice Gorsuch also concurred, arguing that this legal exception is firmly rooted in common-law principles regarding the protection of human life.