547 P.3d 1203
Idaho2024Background
- Cyrus Wolf Buehler was convicted of aggravated DUI after a collision in which a bicyclist, Raymond Hanson, was seriously injured.
- Buehler was driving under the influence with a high blood alcohol content (BAC of .181/.179) when he turned left and collided with Hanson, who was traveling in the opposite direction.
- Buehler sought to introduce expert evidence suggesting that Hanson’s own illegal conduct (speeding, intoxication, and lack of a headlight) was a superseding, intervening cause of the accident.
- The district court excluded this evidence, ruling it was irrelevant to the causation element under Idaho's aggravated DUI statute, which only requires "some causal connection" between the defendant’s DUI and the victim’s injury.
- Buehler also argued that BAC results should be excluded because the officer's certification to operate the breathalyzer had lapsed.
Issues
| Issue | Buehler's Argument | State's Argument | Held |
|---|---|---|---|
| Admissibility of evidence re: Hanson's conduct | Evidence of Hanson's conduct showed a superseding, intervening cause, negating causation by Buehler | Hanson's conduct irrelevant; only need Buehler’s DUI to have some causal connection to injury | Evidence properly excluded; not a superseding cause, causation satisfied |
| Admissibility of BAC evidence (officer's lapsed certification) | Lapsed certification should bar BAC evidence, per administrative rules | Expert testimony independently established reliability of BAC result | BAC evidence was admissible; certification lapse immaterial if testing was reliable |
Key Cases Cited
- State v. Johnson, 894 P.2d 125 (Idaho 1995) (aggravated DUI statute requires only some causal connection between DUI and injury; comparative fault irrelevant)
- State v. Robinett, 106 P.3d 436 (Idaho 2005) (rejects alternative cause defense if defendant’s actions causally contributed to injury)
- State v. Lampien, 223 P.3d 750 (Idaho 2009) (defines intervening, superseding cause in criminal context)
- State v. Svelmoe, 372 P.3d 382 (Idaho 2016) (BAC evidence admissible via expert testimony on reliability and conformity)