When the state charges a person with driving while intoxicated (DWI) in New Jersey, prosecutors have the burden of proving each element of the offense. This includes proving that police did not violate the defendant’s rights against unreasonable searches and seizures under the Fourth Amendment to the U.S. Constitution. As a general rule, police must obtain a warrant in order to conduct a search, seize property, and make an arrest, but courts have identified many exceptions. In practice, police may conduct warrantless searches in certain situations. Courts have ruled that police may briefly detain a person without a warrant, and without the “probable cause” required to obtain a warrant, when they can demonstrate “reasonable suspicion” of some sort of wrongdoing. This is a lower standard than probable cause, and the distinction can be important in defending against DWI charges in New Jersey courts.
New Jersey’s DWI statute prohibits driving while under the influence of alcohol or other substances that are likely to impair a person’s ability to operate a motor vehicle. A defendant can challenge or dispute the evidence offered by the state, but they might also be able to challenge the constitutionality of the arrest itself. Many DWI cases begin with a traffic stop, when a police officer pulls a driver over on the road. If a police officer lacked a legal justification for the stop, the court could suppress any evidence obtained as a result of the stop, or dismiss the case altogether. A defendant must move to suppress evidence obtained in violation of their Fourth Amendment rights.
The U.S. Supreme Court ruled in Terry v. Ohio in 1968 that police may detain a person briefly based on the “reasonable suspicion” standard. These are commonly known as Terry stops. The case involved a person stopped and searched by the police while on foot, but the reasonable suspicion standard has also been applied to traffic stops.
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