The Fourth Amendment to the U.S. Constitution prohibits police from detaining a person temporarily, or stopping a vehicle on the road, without reasonable suspicion of some sort of unlawful activity. Courts are obligated to throw out charges originating from a traffic stop, such as driving while intoxicated (DWI), if the stop violated the driver’s constitutional rights. The New Jersey Supreme Court recently considered whether this state’s high-beam statute can justify a traffic stop under the Fourth Amendment. It ruled in State v. Scriven that the stop was unconstitutional because the officer did not witness an actual violation of the high-beam statute.
The “exclusionary rule” requires courts to suppress evidence obtained by police in violation of a defendant’s Fourth Amendment rights. An officer who initiated a traffic stop must justify the stop based on a suspected traffic offense, such as erratic driving or running a stop sign. Without reasonable suspicion, the state cannot use any evidence obtained as a result of that stop. This might include the officer’s testimony about the driver’s appearance or behavior, field sobriety tests, and Alcotest results.
Although the exclusionary rule is a powerful tool for protecting a defendant’s civil rights when police overstep their authority, courts have identified some exceptions. One of these, the “community care exception,” allows police to search private property without a warrant, as well as possibly detain a person or stop a vehicle, in the course of protecting the public from a hazardous situation. A hypothetical scenario might involve a police officer stopping a vehicle to warn about a hazardous road condition and then arresting the driver based on observations that lead the officer to suspect DWI.
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