HRS § 291C-12(a) “Involved in a Collision” Includes Non-Contact Pursuit; Vagueness Challenges Are As-Applied Only; Bill of Particulars Can Supply Constitutionally Adequate Notice

Case: State v. Nahulu, Supreme Court of Hawaiʻi (July 2, 2026) (Order of Correction filed July 14, 2026).
Statute: HRS § 291C-12(a) (“Collisions Involving Death or Serious Bodily Injury” / “fled scene statute”), incorporating duties under HRS § 291C-14.

1. Introduction

State v. Nahulu arises from a September 12, 2021 police chase in Mākaḥa. The State alleges that then-HPD officer Joshua Nahulu drove the lead pursuit vehicle following a white Honda carrying young occupants. The Honda later struck a curb, rolled, occupants were ejected, and serious injuries resulted. The State further alleges that the pursuing officers did not stop to render aid, left the scene, later returned, and acted as if they did not know what had happened.

Nahulu was charged under HRS § 291C-12(a), which requires a driver “involved in a collision” resulting in serious bodily injury or death to stop, remain, and fulfill duties in HRS § 291C-14 (identification and reasonable assistance). Co-defendants (other HPD officers) were charged with hindering prosecution and conspiracy to hinder prosecution, and joined Nahulu’s motions.

Two issues framed the appeal:

• Vagueness: Whether “involved in a collision” is unconstitutionally vague—particularly if it can apply where the defendant’s vehicle did not physically strike the crashing vehicle.
• Notice: Whether the felony information violated due process by failing to define “involved in a collision,” and whether a bill of particulars could cure any lack of specificity.

2. Summary of the Opinion

The Supreme Court of Hawaiʻi affirmed denial of the motions to dismiss. It held:

• Nahulu lacked standing to press a facial vagueness challenge (no First Amendment implications); only an as-applied vagueness claim was permissible.
• As applied to the alleged conduct (a pursuit culminating in the Honda’s crash), “involved in a collision” was not vague, even though the State’s bill of particulars disclaimed reliance on a vehicle-to-vehicle impact theory.
• On notice, the court held the bill of particulars provided the defendants with sufficient information about the accusation and theory of liability.

3. Analysis

3.1 Precedents Cited (and How They Shaped the Outcome)

A. Vagueness doctrine and the facial/as-applied divide

• State v. Bates: Cited (via State v. Alangcas) for the principle that where First Amendment concerns are absent, defendants generally have standing only to assert vagueness as applied to their own conduct. This frames the threshold standing question and blocks the broader “facial” attack.
• State v. Alangcas: Provides the court’s operative test: vagueness concerns whether a statute is comprehensible to an ordinary person and whether it invites ad hoc, subjective enforcement. Critically, it reaffirmed that absent protected-expression concerns, only as-applied vagueness challenges proceed. The court used Alangcas to convert defendants’ “facial” framing into an as-applied inquiry.
• State v. Pacquing: Supplies the canonical formulation: a penal statute is void for vagueness if it fails to give ordinary people fair notice or encourages arbitrary/discriminatory enforcement. The court also emphasized (from Pacquing) that criminal statutes receive stricter vagueness scrutiny than civil statutes—yet still found no unconstitutional vagueness here.

B. Penal statutory construction (lenity, history, and common sense)

• State v. Bayly: Cited for the proposition that penal law canons counsel narrower readings and support the rule of lenity where ambiguity exists. The court acknowledged this constraint but held that legislative history and purpose defeated any claim that “involved” must mean “made physical contact.”
• State v. Shimabukuro: Reinforces lenity: ambiguous criminal statutes are strictly construed against the government. The court treated lenity as a back-end tool, not a first resort—applied only after considering history and purpose.
• State v. Gaylord: Used to justify the methodology: penal statutes are construed narrowly, but also “in the light of precedent, legislative history, and common sense.” This tripartite lens became the court’s roadmap for rejecting the as-applied vagueness claim.

C. Hawaiʻi’s fled scene statute interpretation

• State v. Chen: The key Hawaiʻi interpretive anchor. The ICA held “‘involved’ can be commonly understood to include the status of ‘being affected or implicated.’” Chen also emphasized HRS § 291C-12(a)’s UVC origin and quoted the UVC commentary stating the UVC requires stops by drivers “involved” even absent a collision/striking by the driver’s own vehicle. Although Chen declined to “forecast” non-contact fact patterns, Nahulu took the next step—using Chen’s breadth and legislative genealogy to validate a non-contact application.
• Wylie v. State and State v. Liuafi: Cited in Chen and repeated here to articulate the statute’s purpose: protect injured persons and facilitate civil/criminal liability determinations; provide prompt assistance to minimize injuries. This purposive framing supports a broad reading—stopping and rendering aid is triggered by involvement in the injurious event, not merely by paint transfer.

D. Persuasive authority from other jurisdictions (UVC-style statutes)

• State v. McClain: Used to rebut the argument that changing statutory terminology (e.g., “accident” to “crash”) necessarily narrows coverage to impact-only scenarios. The Hawaiʻi court analogized that Hawaiʻi’s “accident” to “collision” change does not itself create ambiguity or narrowness.
• Gaulden v. State: Acknowledged as contrary authority (Florida held “accident” to “crash” narrowed the statute), but distinguished because Hawaiʻi’s 2021 amendment was aimed at modernizing terminology and charging compatibility—not narrowing “involved in” coverage.
• Evans v. Commonwealth and Robinson v. Commonwealth: Evans upheld liability where a pursuing driver was “involved” because she was a proximate cause of the crash, even without impact. These cases supplied a familiar doctrinal bridge: “involved” can include non-contact causal participation.
• Clancy v. State and People v. Bammes: Cited for two points: (1) “involved” does not require physical impact; and (2) such statutes are not unconstitutionally vague because a reasonable driver whose actions causally contributed would understand involvement and duties to stop.
• Additional non-contact categories were supported by citations to racing/drag racing and evasive-action cases: State v. Hughes, People v. Brady, State v. Foster, State v. Sene, Comstock v. State, State v. Simpson, Steen v. State, State v. Perebeynos. Their collective significance is comparative: UVC-style statutes are widely read to reach non-impact involvement, and courts have not found them void for vagueness.

E. Sufficiency of charging instruments and notice

• State v. Kauhane: Provides the two-part standard for timely charge challenges: (1) contains elements; and (2) sufficiently apprises what the defendant must meet.
• State v. Merino: Reinforces the general “elements + adequate notice” metric for sufficiency.
• State v. Wheeler: Stands for the strict rule that omission of an element is fatal; also invoked for the procedural timing principle that, for notice analysis, courts consider what the State provided before the defendant objected. Here, because elements were present, the battleground was notice and clarification.
• State v. Kaakimaka: Modern reiteration that even when elements are included, the charge must still apprise the defendant of what to prepare to meet.
• State v. Israel: Supplies the decisive move: courts consider “all of the information supplied to a defendant” when determining whether the right to be informed was violated. This is the doctrinal basis for crediting the bill of particulars as part of the notice package.

3.2 Legal Reasoning (How the Court Got There)

1. Step 1: Constrain the challenge to as-applied vagueness.
   Because HRS § 291C-12(a) does not implicate free speech or protected conduct, the court applied the Alangcas/Bates standing rule: the statute cannot be attacked facially for vagueness where it plainly covers at least some conduct (e.g., a driver physically involved in a collision).
2. Step 2: Identify the operative “as-applied” factual posture.
   The State’s bill of particulars disclaimed reliance on a theory that Nahulu’s vehicle contacted the Honda. Therefore, the vagueness inquiry focused on whether “involved in a collision” is unconstitutionally unclear when applied to alleged pursuit behavior without impact.
3. Step 3: Use legislative history to confirm breadth of coverage.
   The court traced Hawaiʻi’s shift from a “striking” model (pre-1971) to the UVC “involved” model (1971 adoption of UVC language verbatim). The UVC commentary explicitly contrasts impact-only statutes with the UVC’s broader “involved” duty “even though there is no collision or striking.” Then, the court evaluated 2021 Haw. Sess. Law Act 125’s “accident”→“collision” change as terminological modernization (and charging compatibility), not substantive narrowing.
4. Step 4: Align with precedent and persuasive authority.
   The court relied on State v. Chen’s broad understanding of “involved” (“affected or implicated”) and its UVC-based purpose analysis. It then noted the near-uniform approach of other jurisdictions: “involved in” commonly reaches non-contact causal involvement (pursuit, racing, evasive action) and has not been held unconstitutionally vague.
5. Step 5: Apply “common sense” to the facts alleged.
   The opinion closes the vagueness analysis by emphasizing real-world clarity: it is “common sense” that a driver—“especially a police officer”—who pursues a vehicle that crashes must stop and render aid. This addresses the fair-notice prong directly: ordinary persons (and certainly trained officers) would understand the duty in such a scenario.
6. Step 6: Resolve the notice issue through the bill of particulars.
   The felony information contained the elements, including “involved in a collision.” Any ambiguity about the State’s theory (impact vs. non-impact involvement) was resolved by the bill of particulars ordered due to conflicting evidence. Under State v. Israel, this additional disclosure counted toward satisfying Hawaiʻi Constitution article I, section 14.

3.3 Impact (What This Changes Going Forward)

• Expanded practical reach of HRS § 291C-12(a): Hawaiʻi prosecutors can proceed on a theory that a driver was “involved in a collision” even without vehicle-to-vehicle impact—particularly in causal scenarios such as pursuits or conduct immediately leading to a crash. The decision substantially reduces the viability of “no contact, no duty” defenses in fled-scene prosecutions.
• Vagueness litigation will narrow, not broaden: By reiterating the no-facial-vagueness rule outside protected-conduct contexts, the court steers future defendants toward fact-specific as-applied arguments rather than broad attacks on the statute’s language.
• Greater emphasis on bills of particulars in complex theories: Where “involvement” can be proven multiple ways (impact, proximate causation, pursuit, coordinated conduct), trial courts may increasingly order bills of particulars to prevent surprise and to clarify which theory (or which theories) the State intends to rely upon.
• Potential legislative response invited: The court explicitly suggested the legislature “may wish to codify a definition,” offering illustrative language tying “involved” to “events immediately leading to the collision” with a “logical and substantial” connection. That invitation may shape future statutory amendments and jury-instruction development.

4. Complex Concepts Simplified

• Facial vs. as-applied vagueness: A facial challenge claims a statute is unclear in all (or most) applications; an as-applied challenge claims it is unclear when applied to the defendant’s specific conduct. Here, because the statute clearly applies to drivers who physically collide, a facial challenge was not available.
• “Void for vagueness” (two core concerns): A criminal law is unconstitutional if it (1) fails to give fair notice of what conduct is prohibited, or (2) gives police/prosecutors too much discretion to enforce it arbitrarily.
• Rule of lenity: If a criminal statute remains genuinely ambiguous after standard interpretive tools, courts interpret it in the defendant’s favor. The court acknowledged lenity but concluded legislative history and UVC purpose made the statute’s breadth sufficiently clear.
• Bill of particulars: A court-ordered document in which the prosecution specifies details of its theory so the defense can prepare and avoid surprise. Here, it clarified the State was not relying on physical contact between Nahulu’s vehicle and the Honda.
• Proximate cause (as used in other states’ “involved in” cases): A legal concept meaning the defendant’s conduct was sufficiently connected to the result (the crash) to justify responsibility. The court used other jurisdictions’ proximate-cause approach as persuasive support for non-contact “involvement.”

5. Conclusion

State v. Nahulu clarifies that Hawaiʻi’s fled scene statute, HRS § 291C-12(a), is not limited to impact-only events: “involved in a collision” may include non-contact conduct that is meaningfully connected to the collision, such as an alleged pursuit. Procedurally, the decision reinforces that vagueness challenges are typically as-applied outside protected-conduct contexts and that the constitutional notice requirement can be satisfied by the charging instrument together with a clarifying bill of particulars. The opinion both broadens operational accountability under the stop-and-render-aid regime and signals a possible legislative next step: codifying a definition of “involved in a collision” to make the statute’s breadth explicit.