Ex Post Facto — related Supreme Court cases
This page groups Supreme Court cases that involve the constitutional concept “Ex Post Facto”. Use it to explore related decisions and see how the same idea shows up across different cases.
“Ex Post Facto” is:
Prohibition on retroactively applying criminal laws to increase punishment.
Source: Article I Where this concept definition/label comes from (for example, a constitutional provision or a reference framework).
Cases
These are cases where this concept was identified as relevant. Click a case to view its summary, holding, and supporting syllabus excerpts.
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Ellingburg v. United States
20th January 2026
The case directly addresses whether the application of the MVRA to Ellingburg violates the Ex Post Facto Clause.
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Hewitt v. United States
26th June 2025
The case involves the retroactive application of the First Step Act's more lenient penalties, which is related to the prohibition on retroactively applying criminal laws to increase punishment.
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Brown v. United States
23rd May 2024
The case involves whether a state drug conviction counts as an ACCA predicate if the drug was later removed from the federal schedules, which relates to the prohibition on retroactively applying criminal laws to increase punishment.
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Concepcion v. United States
27th June 2022
The case involves the retroactive application of the Fair Sentencing Act, which implicates the prohibition on retroactively increasing punishment.
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Terry v. United States
14th June 2021
The case involves the retroactive application of sentencing laws, specifically whether changes in sentencing laws apply to offenses committed before the laws were enacted.
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Kansas v. Glover
6th April 2020
The case involves the interpretation of a statute to determine if it applies retroactively to enhance sentences based on prior convictions.
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Kansas v. Garcia
3rd March 2020
The case involves the interpretation of statutory language to determine if past convictions qualify for enhanced sentencing, which relates to how laws apply to past actions.
