New Jersey’s driving while intoxicated (DWI) laws allow prosecutors to prove impairment by alcohol in several ways. Evidence of blood alcohol content (BAC), determined by a breath, blood, or urine test, is a well-known method. Prosecutors may also offer witness testimony, particularly testimony by an arresting officer and others who observed the defendant at the time of the arrest. The New Jersey Supreme Court has held that no particular expertise is required to form an opinion, which would be admissible in court, that a person is intoxicated based on observation of the person. The New Jersey Appellate Division recently ruled in State v. Colabella that a BAC below the legal limit for DWI did not supersede officer testimony regarding a defendant’s intoxication in a DWI case. Even though the person’s BAC was not high enough to create a presumption of impairment, the court accepted other evidence.
A BAC of 0.08 percent creates a presumption of intoxication under New Jersey law. This BAC amount is commonly known as the “legal limit” for DWI, and a DWI offense based on BAC evidence is often known as “per se DWI.” New Jersey law makes it a separate offense to refuse to submit to breath testing. This indicates how important the state considers BAC evidence, but it is not absolutely required for a DWI conviction. The DWI statute defines the offense as driving “while under the influence of intoxicating liquor” or other substances, or with a BAC of 0.08 or higher. Prosecutors can introduce evidence that someone was “under the influence” through officer testimony about how the defendant was driving, their demeanor and appearance, the odor of alcohol, and their performance on field sobriety tests (FSTs).
The defendant in Colabella challenged a DWI conviction when BAC test results showed a BAC below the legal limit. According to the Appellate Division’s opinion, an officer pulled the defendant over for an illegal turn and an expired inspection sticker. The officer testified at trial that he detected a “strong odor of alcohol” coming from the vehicle. He also stated that the defendant had “slow and slurred” speech and “blood shot and watery” eyes, all indicators of alcohol impairment. The defendant reportedly admitted to consuming one beer and some ibuprofen.