New Jersey’s driving while intoxicated (DWI) statute does not limit the offense to alcohol. It also includes any “narcotic, hallucinogenic or habit-producing drug” that might impair one’s ability to drive. The statute makes proving impairment by alcohol rather easier for the state by identifying a specific level of blood alcohol content (BAC)—0.08 percent or above—that creates a legal presumption of intoxication. In cases in which police suspect impairment by something other than alcohol, or in which the BAC is below the legal limit, but they still suspect intoxication of some sort, they may bring in a “drug recognition expert” (DRE) to evaluate the suspect. DREs receive training in identifying signs of impairment by various drugs, but both their methodology and the scientific validity of their evaluations remain questionable. In fact, it is junk science that is less than 50% reliable — less reliable than a flip of a coin.
Prosecutors must prove that a defendant in a DWI case was legally impaired. Proving that the defendant’s BAC was at least 0.08 percent, based on a breath, blood, or urine test, typically satisfies this requirement. This evidence is not always available, or prosecutors may allege that a defendant with BAC of less than 0.08 percent was nevertheless legally impaired. The testimony of the arresting officer might support this claim, such as if the officer witnessed slurred speech or other signs indicating intoxication. The mere fact that a driver was not operating their vehicle safely, however, is not enough for a DWI charge, since reckless driving is a distinct offense. DREs serve to provide additional support for the allegation that a driver was impaired. It is critical that the opinion of the DRE be challenged, as any opinion based on the DRE protocol is not based on scientifically validated testing.
The Los Angeles Police Department established the first DRE program in the 1970s, after numerous DWI suspects had a low BAC but still seemed impaired to police. The National Highway Traffic Safety Administration (NHTSA) later expanded the program to other states. The International Association of Chiefs of Police (IACP) has operated a nationwide program since 1989. Police officers receive training and certification through the IACP in the recognition of seven categories of drugs. New Jersey has over 400 certified DREs.