suspect will flee before a warrant can be obtained; where a person is in need of assistance; where entry is required to prevent harm to a person. In deciding whether such entry was legal, courts will consider whether a reasonable and prudent person would have considered there was need to make an immediate entry. In the 1925 Supreme Court case Carroll et al. v. United States, George Carroll and John Kiro were indicted and convicted for carrying “spirituous liquor” in contravention of the National Prohibition Act. Police officers had followed the defendants after their car passed their patrol car and after they caught up with them, they stopped them. After requiring them to pull over, the police officers then conducted a search of the vehicle. In finding that the search was legal, the court compared stopping and searching motor vehicles to the way that the Coast Guard are able to stop and search vessels at sea. The 1970 case of Chambers v. Maroney upheld the categorical application of the automobile exception as it applied to a car that had been searched when impounded.. The court upheld the constitutionality of the search on the grounds that at the time the car was stopped, there was probable cause to conduct a search. In 1973, the case of Cady v. Dombrowski provided further support for the categorical application of the automotive exemption. Dombrowski was stopped and arrested while driving drunk. He was a police officer. Wondering about the location of Dombrowski’s service firearm, which he was meant to carry with him at all times, another police officer conducted a search of the car. In doing so, he uncovered bloodstained items, which eventually led to Dombrowski’s arrest and later conviction for murder. This evidence was admissible. See also Missouri v. McNeely (2013) The United States Supreme Court ruled that police must generally obtain a warrant before subjecting a drunken-driving suspect to a blood test, and that the natural metabolism of blood alcohol does not establish a per se exigency that would justify a blood draw without consent. Mitchell v. Wisconsin (2019) U.S. Supreme Court case in which the Court ruled that in the event a driver is unconscious and therefore can't be given a breath test as an alternative to testing blood, exigent circumstances allow for the drawing of blood without a warrant. Plain view doctrine Search and seizure Brigham City v. Stuart Powers