Driver’s Admission to Drinking Was Enough Probable Cause for Police to Order Breath Testing, According to New Jersey Court
The Fourth Amendment to the U.S. Constitution protects people from “unreasonable searches and seizures” by law enforcement. It requires police, in order to obtain a search warrant, to demonstrate “probable cause” to believe that the search will yield evidence of criminal activity. U.S. courts have identified various exceptions to the warrant requirement, but it remains a powerful safeguard of people’s rights. The New Jersey Superior Court, Appellate Division recently considered a DWI defendant’s argument that her admission to drinking alcohol during a lawful traffic stop did not provide enough probable cause to justify breath testing or field sobriety testing. The court rejected this argument in State v. Dunn, finding that her voluntary admission was enough to establish probable cause.
Courts have identified numerous exceptions to the Fourth Amendment’s warrant requirement. The “automobile exception,” for example, holds that cars and other motor vehicles may be subject to stops and limited searches without a warrant. The primary rationale for this exception is that any evidence a vehicle might contain is at risk of disappearing. This has an obvious bearing on DWI cases, many or most of which begin with a traffic stop.
The Supreme Court has held that police may stop a person and conduct a basic search, even without enough probable cause to support a warrant, if they have a reasonable suspicion that the person is in the process of committing, has recently committed, or is about to commit an offense. This is known as a “Terry stop,” after the Supreme Court’s 1968 decision in Terry v. Ohio. It applies both to in-person stops, often known as “stop and frisks,” and to traffic stops.