What is the automobile exception to the warrant requirement and what must exist for it to apply?

• A. A vehicle can be searched without a warrant if there is probable cause to believe evidence of a crime is present due to the vehicle's mobility; the search must be limited to areas where such evidence might be found.
• B. A warrant is always required for any vehicle search
• C. Consent is required for vehicle searches
• D. The vehicle must be stopped on a public road

Answer: (A)

The main idea here is the automobile exception: because vehicles are inherently mobile, police can search a car without a warrant when there is probable cause to believe the vehicle contains evidence of a crime. The mobility creates a risk that the evidence could be moved, hidden, or otherwise gone if officers waited for a warrant. Once probable cause exists, the search can proceed without a warrant, but the scope must stay focused on areas where the evidence could realistically be found. You’re allowed to search the parts of the vehicle where contraband or evidence is likely to be located, including compartments, the trunk, and other storage areas, but you shouldn’t rummage through unrelated areas without probable cause.

The other common approaches—like needing a warrant for any vehicle search, requiring consent, or insisting the vehicle must be stopped on a public road—don’t apply to this rule. A warrant isn’t always required when there’s probable cause tied to a vehicle’s mobility, consent isn’t necessary, and the vehicle doesn’t have to be stopped only on a public road for the exception to apply.