Civil Rights and Wrongs is a recurring collection by Daniel Harawa protecting prison justice and civil rights instances earlier than the courtroom.
Please be aware that the views of outdoor contributors don’t mirror the official opinions of SCOTUSblog or its employees.
For hundreds of years, a doctrine often called the rule of lenity served a significant perform in American prison regulation. In response to this rule, when a prison statute is unclear about what conduct it means to punish, courts ought to resolve that uncertainty in favor of the defendant. Lenity was not your common canon of development. It was a constitutional safeguard, rooted in ideas of truthful discover and the separation of powers. At its core, the rule of lenity was designed to stop judges from increasing prison legal responsibility past what the legislature had clearly prescribed.
This constitutionally grounded understanding of the rule of lenity is clearest within the Supreme Courtroom’s most canonical lenity case, 1820’s United States v. Wiltberger. The info there have been each easy and revealing. Wiltberger was charged with manslaughter for a killing that occurred aboard an American ship on the Tigris River in China. The federal statute at problem punished killings dedicated on the “excessive seas.” The federal government urged the courtroom to learn that phrase broadly. Certainly, argued the federal government, Congress couldn’t have meant to go away severe crimes past federal attain just because they occurred on a river quite than an ocean.
Chief Justice John Marshall rejected this argument whereas on the similar time acknowledging its “power.” He conceded that the federal government’s argument may make sense as a matter of coverage. However coverage, Marshall insisted, was inappropriate. Rivers weren’t the “excessive seas,” and it was not the judiciary’s position to increase a penal statute past its clear phrases. Defining crimes and fixing punishments, Marshall defined, is the legislature’s prerogative. If Congress wished to criminalize killings on rivers, it should achieve this explicitly. Till then, it was not for the courtroom to fill that hole. Lenity, in different phrases, was about judicial restraint.
For a lot of the courtroom’s historical past, that framework held. Justice Oliver Wendell Holmes, Jr. cautioned in opposition to studying statutes primarily based “upon the hypothesis that, if the legislature had considered it, very seemingly broader phrases would have been used.” Justice Antonin Scalia warned that it isn’t a courtroom’s job to “play the a part of a thoughts reader” when decoding statutes. Below this long-held understanding, lenity utilized when, after deploying odd instruments of interpretation, affordable doubt remained a couple of prison statute’s attain.
Immediately, the rule of lenity is in disarray. The fashionable confusion started with what could in any other case appear a throwaway line. Within the 1974 case of Huddleston v. United States, the courtroom described lenity as making use of solely when the statute accommodates a “grievous ambiguity or uncertainty.” Not like Marshall’s opinion, Huddleston didn’t floor lenity in issues concerning the separation of powers or truthful discover. Certainly, the opinion supplied little clarification for this language, and it didn’t interact the courtroom’s earlier instances offering a neater set off for lenity.
Since Huddleston, the courtroom has by no means clearly defined what makes ambiguity “grievous,” why that commonplace is constitutionally acceptable, or the way it squares with Wiltberger’s insistence that courts could not prolong penal statutes by judicial fiat. Decrease courts, left with out steerage, have crammed the hole inconsistently. Some apply a reasonable-doubt framework in line with Wiltberger. Others invoke the “grievous ambiguity” commonplace articulated in Huddleston. The truth is, each federal courtroom of appeals has utilized each the “affordable doubt” commonplace and the “grievous ambiguity” commonplace, as a result of as the total United States Courtroom of Appeals for the fifth Circuit just lately noticed: “The Supreme Courtroom doesn’t seem to have determined which of those requirements governs the rule of lenity.”
Latest debates among the many justices reveal simply how unstable the doctrine has turn out to be. Just a few years in the past, in Picket v. United States, Justices Neil Gorsuch and Brett Kavanaugh traded concurrences in regards to the correct scope of the rule of lenity. Gorsuch argued – in keeping with previous understandings – that lenity isn’t a discretionary canon however a constitutional rule rooted in due course of and respect for the roles of coordinate branches of presidency. On his view, if “conventional instruments of statutory interpretation yield no clear reply, the choose’s subsequent step … is to lenity.” Kavanaugh, in contrast, asserted that lenity ought to function solely on the very finish of the interpretive course of and may “not often if ever come[] into play.”
This uncertainty issues. Congress has enacted 1000’s of prison legal guidelines, many written broadly and enforced aggressively. With a very bloated prison code, lenity ought to perform as a significant examine – a reminder that punishment should relaxation on clear legislative authorization. Gorsuch stated it greatest: “Below our rule of regulation, punishments ought to by no means be merchandise of judicial conjecture.” However with out clarification from the courtroom, that hazard will persist.
At backside, the rule of lenity is about who bears the chance of uncertainty within the prison regulation. For a lot of the courtroom’s historical past, that threat fell on the federal government. When Congress failed to talk clearly, defendants have been entitled to the advantage of the doubt. If it wished, Congress may rewrite the regulation to make clear its attain. There isn’t any value for congressional imprecision, nonetheless, and thus no actual want for Congress to legislate fastidiously and clearly. When lenity is weakened, the price of ambiguity shifts from the federal government to defendants, and the result’s extra defendants. Given the pedigree and significance of this rule, the Supreme Courtroom must resolve when the rule applies sooner quite than later. Within the phrases of Scalia: “If [lenity] is now not the presupposition of our regulation, the Courtroom ought to say so, and scale back the rule of lenity to a historic curiosity.”
Instances: Picket v. United States
Advisable Quotation:
Daniel Harawa,
Reviving lenity,
SCOTUSblog (Dec. 26, 2025, 9:30 AM),
https://www.scotusblog.com/2025/12/reviving-lenity/



















