Darwin Veach (defendant) was in a car accident while driving intoxicated in a national park. Two park rangers, Greg Mullin and Karen Bradford, arrived and prepared to take Veach into custody. Veach resisted, pulling away from Mullin and causing him to scrape his knee on the ground. In the car, Veach repeatedly threatened to kill Mullin and Bradford by shooting them or decapitating them. His conduct led to his conviction for one count of resisting a federal officer and two counts of threatening to assault and murder a federal officer with the intent to interfere with the officer’s enforcement of his duties. Veach appeals, arguing that the trial court should have allowed him to present a defense of voluntary intoxication.