Trying Cases in Wyoming: What O’Boyle v. State Teaches About Constitutional Boundaries at Trial

The Core Lesson: Reasonableness Reigns 

In O’Boyle, the defendant was pulled over for speeding—just 4 mph over the limit. He ended up with five pounds of marijuana seized from a rental car. Sounds like an open-and-shut case, right? 

Not so fast. 

The Court ruled the initial detention was unreasonable under Article 1, Section 4 of the Wyoming Constitution. Why? Because the trooper’s questioning far exceeded the purpose of the traffic stop. Topics like the names of O’Boyle’s children, his job history, and airline prices had nothing to do with speeding or public safety. 

This wasn’t just bad police work—it was unconstitutional. The Court reversed the conviction, emphasizing that prolonged detentions and “fishing expeditions” violate Wyoming’s stronger search and seizure protections.. 

Trial Tips from O’Boyle 

1. Use the Wyoming Constitution Strategically 

Defense attorneys should invoke Article 1, § 4—not just the federal Fourth Amendment. The Wyoming Constitution offers greater protection when it comes to traffic stops and extended questioning. 

In O’Boyle, the Court explicitly found the detention unconstitutional under state law, even though federal cases (like Taverna and Manjarrez) suggested otherwise. 

Trial Strategy Tip: File suppression motions under both state and federal grounds. Argue Wyoming-specific case law like Vasquez v. State, 990 P.2d 476 (Wyo. 1999), and highlight how state courts diverge from federal bright-line rules.. 

2. Don’t Assume Consent Is Valid 

The trooper in O’Boyle told him to “have a safe trip,” then immediately reengaged him in questioning—leading to “consent” to search the vehicle. But the Court said that consent wasn’t valid. 

Why? Because: 

• The prior detention was already illegal 

• The “consent” followed that illegal detention 

• A reasonable person wouldn’t feel free to leave 

Trial Strategy Tip: When prosecutors rely on consent, challenge the context: Was your client free to leave? Was the request truly voluntary? Use bodycam footage and suppression hearing transcripts to build your record.. 

3. Wyoming Jurors Value Liberty 

The Court didn’t just cite caselaw—it cited local realities. Wyoming’s geography and highways (especially I-80) make it a hotspot for drug stops. That means a lot of law-abiding citizens get caught in wide net stops. 

In O’Boyle, the Court showed empathy for Wyoming drivers constantly facing invasive traffic stop tactics—and expressed concern about routine consent searches becoming normalized. 

Trial Strategy Tip: Don’t be afraid to appeal to Wyoming values. Jurors understand personal privacy and dislike overreach. Framing your suppression issues in terms of fairness and dignity can be powerful.. 

Final Word: Trials Are About More Than Facts—They’re About Boundaries 

If you’re litigating in Wyoming, O’Boyle v. State is your blueprint for defending against improper searches and detentions. It’s a reminder that winning at trial sometimes starts with winning the motion to suppress. 

So read your constitution, prep your suppression arguments, and stand firm on the principles that protect your client’s rights. In Wyoming, the road may be long—but constitutional law still draws the lines.