McBoyle v. United States
The Supreme Court threw out a man's conviction for flying a stolen airplane from Illinois to Oklahoma, ruling that the federal law he was convicted under only covered stolen motor vehicles that travel on land, not aircraft.
The decision rests on the idea that criminal laws must give ordinary people fair warning of what conduct is illegal, and the word "vehicle" in this law would not have signaled to anyone that it covered airplanes.
“It is a vehicle that runs, not something, not commonly called a vehicle, that flies.”
The Court explains why an everyday reading of 'vehicle' does not include airplanes.
How it got here: A trial court convicted the man and a federal appeals court affirmed; the Supreme Court agreed to decide whether the theft law covers airplanes.
The Case in Depth
What happened
A man was convicted of flying an airplane he knew to be stolen from Ottawa, Illinois, to Guymon, Oklahoma. He was sentenced to three years in prison and a $2,000 fine under a federal law originally aimed at stolen cars and other land vehicles crossing state lines. He argued the law never meant to cover airplanes.
The question before the Court
Did a 1919 federal law against transporting a stolen "motor vehicle" across state lines also cover a stolen airplane?
Why it matters
The ruling meant a man convicted of a federal crime for flying a stolen airplane across state lines could not be punished under that particular law. More broadly, it reinforced that people accused of crimes are entitled to clear, understandable warning from the text of a criminal statute before being punished, shaping how later courts read ambiguous criminal laws.
What changes now
The Court reversed the conviction, meaning the man could not be punished under this particular federal statute for transporting the stolen airplane. The ruling is a final decision on the merits of how the law should be read. Any future prosecution for stolen aircraft would need to rely on a different or later-amended law rather than this one.
What this does not decide
The Court did not decide whether Congress could pass a law covering stolen aircraft, only that this particular 1919 statute, written to describe land vehicles, did not already do so. It also left untouched whether other, later statutes might cover aircraft theft.
How the Court got there
The legal reasoning, step by step
- The Court focused on how the statute defined the vehicles it covered, listing 'automobile, automobile truck, automobile wagon, motor cycle, or any other self-propelled vehicle not designed for running on rails.'
- The Court reasoned that in everyday speech, the word 'vehicle' calls to mind something that moves on land, not something that flies, even though the word could technically be stretched to cover other modes of travel.
- The Court noted that other federal statutes, like tariff laws, explicitly added language to cover aircraft or water travel when Congress meant to include them, showing Congress knew how to extend the term when it wanted to.
- Because the statute's list of examples referred only to land vehicles and Congress had not mentioned aircraft in the law's history despite airplanes being well known by 1919, the Court concluded the list was not meant to reach airplanes.
- Applying the principle that criminal laws must give people fair warning in language the general public would understand, the Court held that a law evoking only the picture of land vehicles should not be stretched to cover aircraft just because a similar policy might seem to apply.