Shular v. United States
The Supreme Court ruled that federal courts applying the Armed Career Criminal Act's mandatory sentence boost for prior drug convictions need only ask whether the state offense involved the same drug-related conduct — manufacturing, distributing, or possessing with intent to distribute — rather than measuring the state crime against a 'generic' version of a drug offense.
The decision resolves a split among federal appeals courts and makes it harder for defendants to escape the 15-year mandatory minimum by pointing to differences between their state convictions and how most states define drug crimes.
“The "serious drug offense" definition requires only that the state offense involve the conduct specified in the federal statute; it does not require that the state offense match certain generic offenses.”
The Court's central holding on how to apply the Armed Career Criminal Act's drug offense definition.
How it got here: A federal trial court in Florida sentenced Shular to the ACCA mandatory minimum; the Eleventh Circuit affirmed; the Supreme Court granted review to resolve a split among appeals courts.
The Case in Depth
What happened
Eddie Lee Shular pleaded guilty in federal court to being a felon in possession of a firearm and to drug distribution charges. Because he had six prior Florida drug convictions, a federal judge applied the Armed Career Criminal Act's mandatory 15-year minimum sentence. Shular argued those Florida convictions shouldn't count: Florida's drug law didn't require prosecutors to prove he knew the substance was illegal, which he said was a required element of any "generic" drug offense under the federal statute.
The question before the Court
When prior state drug convictions trigger a 15-year mandatory minimum federal sentence, must courts compare those convictions to a standard "generic" drug offense, or is it enough that the state crimes involved the same basic drug-related conduct?
The Court's answer
No — the Armed Career Criminal Act's "serious drug offense" definition does not require courts to compare a state drug conviction to a standard "generic" version of the crime. Courts need only ask whether the state offense necessarily involved the conduct listed in the federal statute: manufacturing, distributing, or possessing with intent to distribute a controlled substance.
The Court reached this conclusion by reading the statute's text carefully. The phrase "involving manufacturing, distributing, or possessing with intent to distribute" uses conduct-describing language, not offense names. Unlike the nearby provision that says a violent felony "is burglary, arson, or extortion" — using "is" to signal comparison to named crimes — the drug provision uses "involving," a word that naturally pairs with conduct. Drug-related terms like "distributing" also lack the common-law heritage of offense names like "burglary," making a generic-offense comparison inappropriate.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Defendants with prior state drug convictions — even under state laws that don't require proving the person knew a substance was illegal — can still face the 15-year mandatory minimum if the state offense involved the listed conduct. Defense lawyers lose one route to challenging ACCA sentence enhancements, and federal prosecutors and judges now have clearer, uniform rules to follow across all circuits.
What changes now
Shular's 15-year mandatory minimum sentence stands. Going forward, federal courts nationwide must use the conduct-based approach when deciding whether a prior state drug conviction counts under ACCA — asking whether the state offense necessarily involved the listed drug-related conduct, not whether it matches a generic crime. This resolves the circuit split on the question. The Court left open whether ACCA independently requires knowledge of a substance's illegality, which was not properly before it.
What this does not decide
The Court explicitly declined to address Shular's alternative argument that the drug offense provision independently requires knowledge that the substance was illegal, regardless of how the "serious drug offense" definition is read. That question was outside the scope of the case as granted and was disclaimed by Shular at the certiorari stage.
Concurrences and dissents
Concurrence — Justice Kavanaugh
Justice Kavanaugh joined the full majority opinion but wrote separately to elaborate on the rule of lenity. He explained that two conditions must both be met before that rule can apply: courts must first exhaust every traditional tool of statutory interpretation, and they must then find 'grievous' ambiguity — meaning the court can do no better than guess at Congress's intent. Ordinary ambiguity is not enough. He argued this demanding standard explains why the rule of lenity rarely comes into play in practice.
How the Court got there
The legal reasoning, step by step
- The Armed Career Criminal Act requires a 'categorical approach' when determining whether a prior conviction counts as a 'serious drug offense' — courts look only at the legal elements of the prior offense, not at what the person actually did. The central dispute was which version of the categorical approach applies: one that compares the state offense to a 'generic' drug crime, or one that simply asks whether the state offense's elements necessarily involve specified conduct.
- The Court drew on two prior lines of cases. Under the first (illustrated by Taylor v. United States, the 1990 case establishing categorical-approach rules), courts identify the elements of the 'generic' version of a named crime — like 'burglary' — and compare the state offense to that standard. Under the second (illustrated by Kawashima v. Holder, a 2012 immigration case), courts skip the generic-crime step and simply ask whether the state offense necessarily entails the described conduct — such as 'fraud or deceit.'
- The key textual signal in the drug provision is the word 'involving,' which both sides agreed means 'necessarily requiring.' The Court found it natural to say an offense 'involves' certain conduct, and pointed to the neighboring violent-felony provision — which uses 'is burglary, arson, or extortion' — as a sharp contrast. The word 'is' signals a comparison to named offenses; 'involving' does not.
- The terms 'manufacturing,' 'distributing,' and 'possessing with intent to distribute' are not recognized names for specific crimes the way 'burglary,' 'arson,' and 'extortion' are. States use many different words for core drug crimes — trafficking, selling, delivering, dispensing — and those drug terms lack the common-law heritage that makes a generic-offense comparison appropriate.
- Shular's concern that Florida's law was an outlier — because it didn't require proving knowledge of illegality — did not change the analysis. Both readings of the statute produce some consistency; the Court concluded Congress chose to focus on conduct, not generic-offense matching, and the Florida law still allowed a defendant to raise lack of knowledge as a defense.
- Finally, the Court rejected the argument that the rule of lenity — the principle that genuinely ambiguous criminal statutes should be read in a defendant's favor — should tip the scales. The rule applies only after all standard tools of statutory interpretation have been exhausted and real ambiguity remains. The Court found the statute's meaning clear enough that no ambiguity survived, leaving no room for lenity.
Doctrinal impact
Cases affected by this decision
Reaffirms Kawashima v. Holder (565 U.S. 478)
The conduct-based categorical approach from Kawashima — asking whether state offense elements necessarily entail specified conduct — is confirmed as the right framework for ACCA's drug provision.
Distinguishes Taylor v. United States (495 U.S. 575)
Taylor's generic-offense comparison method applies only when a statute uses named offenses like 'burglary,' not when it describes conduct as ACCA's drug provision does.