New Jersey DWI Attorney Blog

When police are investigating a person suspected of driving while intoxicated (DWI), they must follow procedures designed to safeguard people’s constitutional rights. The Fourth Amendment to the U.S. Constitution requires police, with some exceptions, to get a search warrant before conducting a search of a person or their property. Evidence that police obtain in violation of the Fourth Amendment is inadmissible in court. A DWI defendant and their attorney can establish that a constitutional violation occurred by filing a motion to suppress. If the court grants the motion, the state cannot use any evidence obtained through the unlawful search. Sometimes, this means prosecutors cannot move forward with the case and must dismiss that charges.

Motions to Suppress in DWI Cases in New Jersey

Municipal courts in New Jersey have jurisdiction over DWI cases. Rule 7 of the New Jersey Rules of Court governs municipal court proceedings.

A DWI defendant can file a motion to suppress evidence obtained in any unlawful search, whether the police had a warrant or not. If the police had a warrant for the search, the defendant must show that it was improper. For example, a warrant could be found to be invalid if the officer withheld important information from the judge who issued the warrant.
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The Sixth Amendment to the U.S. Constitution guarantees the right to a “speedy trial” in criminal prosecutions. The state cannot make you wait an unreasonably long time, possibly while you remain in custody, to have your day in court. Although driving while intoxicated (DWI) is not considered a criminal offense under New Jersey law, the municipal courts that hear DWI cases use many of the same procedures. Most of the rights guaranteed by the Sixth Amendment apply to motor vehicle offenses like DWI, including the right to a speedy trial. The New Jersey Supreme Court recently issued a ruling in a case in which a defendant alleged violation of this right, in part because of the COVID-19 pandemic. The court’s decision offers a useful reminder for New Jersey DWI defendants about their rights.

Violations of a defendant’s constitutional rights can sometimes result in the dismissal of the charges against them. If a DWI defendant can establish, for example, that the police officer who pulled them over had no reasonable suspicion of illegal activity, the court can suppress all evidence obtained from the traffic stop because of the violation of the defendant’s Fourth Amendment rights. If this leaves prosecutors with no evidence, the court could dismiss the case. A violation of the right to a speedy trial can also lead to the dismissal of the charges if a trial has not taken place yet, or the reversal of a conviction and sentence on appeal.

The U.S. Supreme Court established a four-part test for evaluating speedy trial claims in 1972’s Barker v. Wingo:
1. The length of the delay before trial;
2. The reason(s) for the delay;
3. The circumstances in which the defendant is claiming a violation of the right to a speedy trial; and
4. The extent to which the delay has prejudiced the defendant’s rights.
The court left it to individual courts to determine how much time is too much for the first part of the Barker test. Prosecutors could claim a valid reason for what appears to be an unreasonable delay. A court must balance this with issues like the availability of defense witnesses and other evidence after a significant amount of time has passed.
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Prosecutors who handle New Jersey driving while intoxicated (DWI) cases must prove that a defendant is guilty beyond a reasonable doubt. They present evidence in order to establish that a defendant was under the influence of alcohol or drugs. In order to counter this evidence, a defendant may need to produce an expert witness. A compelling report from an expert could even convince a prosecutor to drop a DWI charge. If not, the expert can testify at trial about their findings. An experienced DWI defense lawyer can identify where expert testimony would be most helpful and can find qualified experts for your case.

What Is an Expert Witness?

Rule 702 of the New Jersey Rules of Evidence (NJRE) defines an expert witness as someone who has particular “scientific, technical, or other specialized knowledge,” which they have attained through “knowledge, skill, experience, training, or education.” This definition has three important components:
1. The subject must be beyond many or most people’s understanding.
2. The witness’ field of expertise must be established enough to provide reliability.
3. The witness must demonstrate that they have achieved expertise in the field.
Unlike other witnesses, expert witnesses may testify about their opinions, as long as those opinions are based on their expert knowledge and can help a judge understand a DWI case.

A police officer with training in the use of Alcotest devices, for example, may testify about the condition and reliability of the machine used to test samples of a defendant’s breath. A drug recognition expert (DRE) could testify about their conclusion, based on training and experience, that a defendant was under the influence of a particular drug or type of drug.
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Driving while intoxicated (DWI) is a serious offense under New Jersey law. A conviction can result in a fine, driver’s license suspension, jail time, and other penalties, depending on various factors. DWI attorneys work hard to make sure the state follows the law and respects their clients’ rights. If a case goes to trial, and the court convicts the defendant of DWI, they may still be able to keep fighting the charges by filing an appeal. New Jersey law requires a defendant appealing a DWI conviction, also known as the “appellant,” to cite specific grounds for the appeal. It is not enough that the appellant is not happy with the outcome of the trial. They must show that the court made an error, or that the process was flawed.

Appeals Based on the Evidence

In any DWI case, the prosecution has the burden of proving the defendant’s guilt beyond a reasonable doubt. This is the strictest burden of proof in our legal system. A prosecutor’s job is supposed to be difficult, since success for a prosecutor could mean a loss of freedom for a defendant.

A DWI appellant can argue that the state did not produce enough evidence to support a guilty verdict. Prosecutors must have evidence of guilt beyond a reasonable doubt for every element of the offense. A Law Division court, which hears appeals of DWI verdicts from municipal courts, could find that the state’s evidence was insufficient to meet the prosecutor’s burden of proof.
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In any case involving alleged driving while intoxicated (DWI) in a New Jersey municipal court, the state must prove the defendant’s guilt beyond a reasonable doubt. The New Jersey Rules of Evidence establish what kinds of evidence courts may consider, and what attorneys must do to get their evidence admitted. Testimony from various witnesses occurs in every trial. An important limitation on testimony during a trial is known as the “hearsay rule.” You may have heard this term if you watch any lawyer shows on television. What does the hearsay rule actually do, though? The following is an overview of the hearsay rule, and how it can help both sides in different ways in New Jersey DWI cases.

Evidence in New Jersey DWI Cases

New Jersey’s DWI statute allows prosecutors to prove that a defendant was impaired by alcohol or drugs in two ways. Both require testimony.

The state can have the arresting officer testify under oath about the defendant’s behavior or appearance at the time of their arrest. Perhaps, for example, the defendant was slurring their speech, or had bloodshot eyes.
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