Can Utah impose harsher penalties for less impaired drivers than for demonstrably unsafe ones? State v. Ainsworth Explained

In State v. Ainsworth, the Utah Court of Appeals addressed a constitutional challenge to Utah’s Measurable Amount Statute, which criminalizes driving with any measurable amount of controlled substances in one’s body. The case arose from a tragic collision where Ainsworth, with methamphetamine in his system, crossed into oncoming traffic and killed an eighteen-month-old child while seriously injuring two others.

Background and Facts
Ainsworth was charged with three counts of driving with a measurable amount of a controlled substance and negligently causing death or serious bodily injury—each a second-degree felony under Utah Code section 58-37-8(2)(g)-(h). He moved to reduce these charges to third-degree felonies, arguing the statute violated Utah’s uniform operation of laws provision by creating impermissible classifications. The district court denied his motion, and Ainsworth pleaded guilty while preserving his constitutional challenge.

Key Legal Issues
The central issue was whether the Measurable Amount Statute’s classification scheme violated Article I, Section 24 of the Utah Constitution. Specifically, Ainsworth challenged two distinctions: (1) between prescription and non-prescription users of controlled substances, and (2) between drivers with “any measurable amount” of controlled substances versus those “incapable of safely operating a vehicle.”

Court’s Analysis and Holding
The court applied Utah’s three-part uniform operation of laws analysis, examining whether the statute created classifications, imposed disparate treatment on similarly situated persons, and served reasonable legislative objectives. While the court upheld the prescription/non-prescription distinction as rationally related to deterring illegal drug use, it found the second classification unconstitutional. The statute illogically punished less impaired drivers (those with “any measurable amount”) more harshly than demonstrably unsafe drivers, creating an irrational penalty structure.

Practice Implications
The decision establishes important precedent for challenging statutory classifications under Utah’s constitutional equal protection principles. The court vacated Ainsworth’s second-degree felony convictions and remanded for resentencing as third-degree felonies, demonstrating that successful constitutional challenges can significantly reduce criminal penalties even in serious cases involving tragic consequences.