The Carroll doctrine originates from which landmark case?

• A. Terry v. Ohio
• B. Carroll v. United States
• C. Mapp v. Ohio
• D. Chimel v. California

Answer: (B)

This concept focuses on why police can search a moving vehicle without a warrant when there is probable cause to believe it contains evidence. The rule arises from Carroll v. United States (1925), where the Supreme Court emphasized the car’s mobility and the impracticality of obtaining a warrant before the vehicle might leave the area. Because a vehicle can be quickly moved, police may search the automobile and seize evidence with probable cause under what’s known as the automobile exception to the Fourth Amendment. This exception applies to the vehicle as a whole and its compartments if probable cause exists.

For contrast, Terry v. Ohio deals with stop-and-frisk based on reasonable suspicion, Mapp v. Ohio establishes the exclusionary rule for states, and Chimel v. California concerns searches incident to arrest. The case that originated the doctrine about automobile searches is Carroll v. United States.