Following a jury trial, defendant was convicted of negligent homicide. MCL 750.324; MSA 28.556. On appeal, he argues that the trial court erred in instructing the jury that defendant’s conduct had to be only "a substantial” cause of the accident rather than "the substantial” cause. We reverse.
The fatal accident in this case occurred while defendant and Bobby Osborn were drag racing. Eyewitnesses estimated their vehicles to be traveling at between 70 and 90 miles per hour. Defendant’s vehicle struck and killed the victim approximately three quarters of a mile beyond the start of the race. The victim was hit while running across the street to retrieve a ball. Defendant claimed the race had ended by the time the collision occurred. An accident reconstruction expert estimated that, at the point of impact, defendant was traveling at between 22 and 49 miles per hour. Defendant claimed that the victim ran out in front of his car, his senses impaired from drinking alcohol.
i
The crime of negligent homicide is the killing of a person through an act of ordinary negligence, which only becomes criminal when the victim dies. People v Clark, 171 Mich App 656, 659; 431 NW2d 88 (1988). A decedent’s contributory negligence is not a defense to a charge of negligent homicide. People v Clark, 295 Mich 704, 708; 295 NW 370 (1940); People v Richardson, 170 Mich App 470, 472; 428 NW2d 698 (1988). However, the jury may consider the victim’s negligence to the extent that it bears on the question of proximate cause or on *337defendant’s negligence. Clark, 295 Mich 708; Richardson, supra.
In this case, the trial court instructed the jury that it could consider the victim’s conduct in determining whether defendant’s driving was "a substantial” cause of the accident. Defendant argues that the jury instruction should have required a finding that his act was "the substantial” cause of the accident.
There is currently a split of authority in this Court relating to the causal connection necessary to prove vehicular homicide. Some panels have held that a defendant’s conduct must be "the proximate” cause of the accident. People v Scott, 29 Mich App 549; 185 NW2d 576 (1971). Others have held that it need be only "a proximate” cause. People v Dolen, 89 Mich App 277; 279 NW2d 539 (1977). The current jury instruction states:
If you find that [named deceased] was negligent, you may only consider that negligence in deciding whether the defendant’s conduct was [the/a substantial] cause of the accident. [CJI2d 16.20.]
The commentary notes to CJI2d 16.20 indicate that the trial court must decide whether to follow Scott or Dolen. The phrase "a substantial cause” was taken from Brisboy v Fibreboard Corp, 429 Mich 540, 547; 418 NW2d 650 (1988). There, the Michigan Supreme Court indicated that, when numerous factors produced an injury, one actor’s negligence was not a proximate cause unless it was "a substantial factor” producing the injury.
n
Scott relied on the rationale in Commonwealth v *338Root, 403 Pa 571; 170 A2d 310 (1961). In Root, the Pennsylvania Supreme Court ruled that the tort liability concept of proximate cause has no proper place in prosecutions for vehicular homicide. Id. Scott accepted this holding. Neither Root nor Scott addressed whether the contributory negligence of the decedent could be a defense to vehicular homicide.
Michigan courts have consistently maintained that contributory negligence is not a defense to a charge of negligent homicide. In Dolen, we indicated that the fatal flaw in Scott was the failure to recognize this principle. Dolen, 281. If the existence of another proximate cause of a fatal accident prevents a verdict of guilt against a defendant, contributory negligence is a good defense. Id. The Dolen court found no support for earlier cases holding that a defendant’s negligent driving must be "the sole and only proximate cause” of the fatal accident. Id., 280.
hi
Other jurisdictions follow the Dolen rationale. See Fioretti v Delaware, 245 A2d 170 (Del, 1968); Connecticut v Alterio, 154 Conn 23; 220 A2d 451 (1966). In Alterio, the Supreme Court of Connecticut recognized that contributory negligence is not a defense to a violation of a motor vehicle criminal homicide statute. The state has the burden to prove that "a proximate cause” of the death was the unlawful acts of the defendant. The state fails to meet its burden only if the conduct of the victim was an independent and efficient cause of his death. See Alterio, 29-30.
In Fioretti, the Delaware Supreme Court recognized that defendant’s negligence need not be the *339sole proximate cause of the fatal accident. Fioretti, 171. It is sufficient if the negligence was "one” of the proximate causes. Id.
IV
We agree with the rationale advanced in Dolen, Fioretti, and Alterio. We believe that a defendant’s conduct need not be the proximate or "the substantial” cause of an accident. Instead, it is enough that his conduct be a proximate or "a substantial” cause.
Instructing a jury that the defendant’s conduct was "a substantial” cause of the accident prevents the jury from excusing the defendant’s negligence if the victim is contributorily negligent. Such an instruction also allows the jury to look at the victim’s conduct to determine if the defendant’s conduct was "a substantial” cause of the fatal accident. For example, a jury could conclude that the defendant’s conduct was not "a substantial” cause of the accident if: (1) the victim’s conduct was an intervening and superseding cause of the accident which the defendant could not foresee, or (2) the victim’s conduct was the sole and only proximate cause of the injury. See Clark, 171 Mich App 659; Scott, 555.1
v
Although we recognize that this Court has created a conflict on this issue, we are precluded from *340resolving it. No conflict exists on the issue within the Michigan Supreme Court. According to our Supreme Court, in order for a defendant to be convicted of vehicular homicide, his conduct must be "the proximate cause” of the death. People v Layman, 299 Mich 141, 145; 299 NW 840 (1941); People v Townsend, 214 Mich 267, 275; 183 NW 177 (1921); People v Barnes, 182 Mich 179, 199; 148 NW 400 (1914). We are bound by the doctrine of stare decisis and are powerless to overturn a decision of the Michigan Supreme Court. Schwartz v Flint (After Remand), 120 Mich App 449, 462; 329 NW2d 26 (1982), rev’d on other grounds 426 Mich 295; 395 NW2d 678 (1986).
Reluctantly, we must reverse and remand. On remand, we instruct the trial court that the jury instructions should read "the substantial” not "a substantial” cause. However, we urge our Supreme Court to take up this issue and clarify CJI2d 16.20, because we believe the better reasoned approach is found in Dolen, Fioretti and Alterio.
Reversed.
In Clark, a panel of this Court indicated that, to exonerate a defendant on a negligent homicide charge, the victim’s contributory negligence must be “a substantial” factor causing the injury. Clark, 659-660. We disagree with this ruling. Allowing the defendant to be exonerated if the victim’s negligence was "a substantial” factor would mean that contributory negligence is a good defense to negligent homicide. See Dolen, supra.