In the 1972 case Cady v. Dombrowski, the U.S. Supreme Court ruled on a matter concerning Fourth Amendment protections against unreasonable searches and seizures. The case involved Chicago police officer Chester J. Dombrowski who was arrested for drunk driving in Wisconsin, after which his car was towed to a private garage. While he was unconscious in hospital, local police searched his vehicle without a warrant due to concerns about public safety as they believed there might be a service revolver inside it based on standard Chicago Police Department policy requiring off-duty officers to carry their weapons with them at all times; instead of finding any weapon, they found evidence linking him to an unrelated crime (a murder). The court held that this search did not violate the Fourth Amendment because it fell within "community caretaking functions" exception - duties performed by police officers completely separate from detecting or preventing crimes but aimed at ensuring public safety.

In the dissenting opinion for Cady v. Dombrowski, Justice William O. Douglas argued that the majority's decision to uphold a warrantless search of an incapacitated individual's vehicle violated Fourth Amendment protections against unreasonable searches and seizures. He contended that there was no "exigent circumstance" justifying such a search without a warrant, as police had already secured the car and could have easily obtained one before proceeding with their investigation. Furthermore, he disagreed with the majority's assertion that this case fell under an exception allowing for community caretaking functions by law enforcement officers because it involved criminal evidence rather than public safety concerns or property protection duties typically associated with these roles. In his view, this broad interpretation threatened to erode constitutional safeguards and grant undue power to police forces.