In which case did the US Supreme Court restrict the ability of law enforcement to conduct searches incident to arrest in vehicles?

The correct case that restricted the ability of law enforcement to conduct searches incident to arrest in vehicles is A.Z. v. Grant. In this decision, the court clarified the circumstances under which officers can search a vehicle without a warrant after making an arrest and emphasized the need for a justified reason related to officer safety or the preservation of evidence. This ruling redefined the parameters that law enforcement must follow, thereby limiting their authority to search a vehicle without clear evidence that such a search is necessary or justified at the moment of arrest.

This case represents the evolving standards for search and seizure under the Fourth Amendment, particularly in contexts where law enforcement's actions could be viewed as overreaching when they do not align with the intention of protecting constitutional rights. Understanding this case is crucial for law enforcement officers to ensure they operate within the framework of the law while upholding citizens' rights against unreasonable searches.