Hudson County Criminal Lawyer Blog
The New Jersey Supreme Court issued a unanimous decision in State v. Thomas J. DiNapoli that carries significant implications for how vehicular homicide cases are litigated across the state. At its core, the Court held that a defendant charged with vehicular homicide has the right to present expert testimony challenging the State’s theory of causation under prong one of N.J.S.A. 2C:2-3(c), even when that testimony does not directly rebut “but for” causation. The Court also held that no preliminary N.J.R.E. 104 hearing is required to determine the admissibility of such expert opinions. For criminal defense attorneys and prosecutors working in Hudson, Essex, Union, Passaic, and counties throughout New Jersey, the decision reshapes how causation defenses are built, disclosed, and presented at trial.
On the afternoon of June 4, 2019, Thomas DiNapoli was driving in Union Township when his vehicle crossed the double yellow lines and struck an oncoming car. The front-seat passenger was ninety-four years old and suffering from dementia and Alzheimer’s disease. She was transported to the hospital with rib and patella fractures and lung contusions. The following day, her family opted for palliative care given her overall condition, and she died later that afternoon. DiNapoli, who had taken his prescribed medication Clonazepam in excess of a normal therapeutic dosage before driving, was charged with second-degree vehicular homicide. The autopsy listed the cause of death as blunt impact injuries sustained in the collision.
To contest the State’s theory that his reckless driving caused the front-seat passenger’s death, DiNapoli proffered three experts who concluded that the injuries were not life-threatening and that she would have recovered from the accident had her family not elected palliative care. In their view, the actual cause of death was respiratory depression brought on by the narcotic medications administered as part of hospice treatment, not the trauma from the crash. The State moved to bar all three experts, and after a procedural history that included a mistrial, the Appellate Division sided with the State and remanded the matter for an N.J.R.E. 104 hearing to resolve what it saw as troubling inconsistencies among the defense experts’ reports. The Supreme Court granted leave to appeal and reversed.
The legal framework the Court applied centers on N.J.S.A. 2C:2-3(c), which governs causation in offenses requiring proof of recklessness. The statute offers two alternative pathways for the State. Under prong one, the State must show that the actual result was within the risk of which the defendant was aware. Under prong two, the State may prove causation by demonstrating that the actual result involved the same kind of harm as the probable result and was not too remote or dependent on another’s volitional act to bear on the defendant’s liability. Because the State elected to proceed solely under prong one, the central question at trial will be whether the death was within the risk DiNapoli consciously disregarded when he drove impaired. The Court made clear that this inquiry is broader than simply asking whether the crash was a “but for” cause of her death. It requires the jury to evaluate whether the manner and character of the actual result matched the type of harm his reckless conduct made likely.
Where the Court departed from the Appellate Division was on the question of whether an intervening cause defense has any place in a prong one prosecution. The State argued that intervening cause arguments are exclusively a prong two defense and that the defense experts’ testimony was inadmissible because it failed to defeat “but for” causation. The Supreme Court disagreed squarely. A plain reading of the statute, the Court explained, does not limit the consideration of intervening causes to prong two, and accepting the State’s position would effectively insulate the prong one culpability element from any meaningful challenge. If a jury credits the defense experts and concludes that the death resulted from palliative care for her Alzheimer’s disease rather than from the collision itself, it may reasonably find that the actual result fell outside the risk DiNapoli’s reckless driving created, which would preclude a conviction for vehicular homicide. The Court also dispensed with the need for an N.J.R.E. 104 hearing, holding that any inconsistencies among the three experts go to credibility, a question for the jury, not to threshold admissibility.
The Court also used DiNapoli to impose a new procedural requirement on the State. Going forward, when N.J.S.A. 2C:2-3(c) is implicated, the State must disclose to the defense which prong of the causation statute it intends to rely upon at the earliest possible opportunity, and no later than the pretrial conference. The rationale is straightforward: the State’s choice of prong directly affects what evidence and theories of defense are relevant, and defendants are entitled to a fair opportunity to tailor their presentation accordingly. The trial court, for its part, retains the ultimate authority to decide at the close of evidence whether to instruct the jury on prong one, prong two, or both, based on what the record actually supports.
For practitioners on both sides, the practical takeaways from DiNapoli are immediate. Defense attorneys in vehicular homicide cases should evaluate early whether the facts support an intervening cause theory, and if so, whether expert testimony can establish that the actual result diverged meaningfully from the harm the defendant’s recklessness made likely. The decision confirms that such a defense is viable under prong one and that it does not need to defeat “but for” causation to go to the jury. Prosecutors, for their part, must now make their causation theory of the case known before trial, and they should anticipate that electing prong one does not foreclose a defense challenge to the causal chain. Cases where there is any ambiguity in the medical evidence connecting the defendant’s conduct to the ultimate cause of death will now be harder to prosecute without confronting a robust expert defense at trial.