In the 2009 case of Michigan v. Jeremy Fisher, the U.S. Supreme Court ruled in favor of law enforcement officers who had entered a home without a warrant due to what they perceived as an emergency situation. The police were responding to a complaint about noise and saw through a window that Fisher was bleeding and appeared agitated, leading them to believe he might be dangerous or need help. They entered his house without obtaining permission or securing a warrant first, which led Fisher to argue that this violated his Fourth Amendment rights against unreasonable searches and seizures. However, the court upheld their actions under the "emergency aid exception" doctrine which allows for such entries when there is immediate need for assistance for protection of life or property.

In the dissenting opinion for Michigan v. Jeremy Fisher, Justice John Paul Stevens argued that the majority's decision was a misinterpretation of the Fourth Amendment. He contended that police officers should not be allowed to enter private property without a warrant just because they perceive an emergency situation from outside. In this case, he believed there wasn't enough evidence to suggest an immediate threat or danger when police saw Fisher through his window with blood on him and broken glass around him. The fact that Fisher didn't respond to their knocking doesn't necessarily mean he was in danger; it could simply mean he chose not to answer due to his right of privacy at home. Therefore, according to Justice Stevens, entering Fisher's apartment without a warrant violated his constitutional rights under the Fourth Amendment.