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September 11, 2026Short & citedBlog
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Civic Brief • Law

Double Jeopardy

Double jeopardy is a legal principle that limits repeated criminal prosecution or punishment for the same offence after a final acquittal or conviction.

Updated September 11, 20261 min readCited sources

Double jeopardy is a legal principle that prevents a person from being tried or punished more than once for the same criminal offence after a final acquittal or conviction. It is protected in both the United States and Canada under constitutional provisions.

What it is

Double jeopardy is designed to stop the state from repeatedly prosecuting or punishing someone for the same criminal offence. It protects finality in criminal proceedings and limits harassment through repeated prosecutions. The principle is a core safeguard in common-law systems.

United States protection

In the United States, the Double Jeopardy Clause is found in the Fifth Amendment to the Constitution. It bars a person from being prosecuted twice for the same crime after acquittal or conviction. This protection applies to both federal and state courts, following incorporation in Benton v. Maryland.

Canadian protection

In Canada, section 11(h) of the Canadian Charter of Rights and Freedoms protects against double jeopardy. It bars a second prosecution or punishment for the same offence after a final acquittal or conviction. Canadian courts also apply the Kienapple principle to prevent multiple convictions for the same underlying offence.

In short

  • Double jeopardy prevents repeated prosecution or punishment for the same offence after final acquittal or conviction.
  • In the U.S., it is protected by the Fifth Amendment and applies in federal and state courts.
  • In Canada, section 11(h) of the Charter provides similar protection, with the Kienapple principle.
  • The rule primarily applies to criminal law and does not automatically bar all civil or administrative sanctions.
Canadian angle

In Canada, double jeopardy is a constitutional protection under section 11(h) of the Canadian Charter of Rights and Freedoms, and Canadian courts also apply related doctrines such as Kienapple to prevent multiple convictions for the same underlying offence.[2]

Quick questions

What is double jeopardy?
It is a rule that prevents a person from being tried or punished more than once for the same offence after a final acquittal or conviction.
Does double jeopardy apply in the United States?
Yes. It is protected by the Fifth Amendment and applies in both federal and state courts.
Does double jeopardy apply in Canada?
Yes. Section 11(h) of the Canadian Charter protects against double jeopardy, and Canadian law also recognizes related doctrines such as Kienapple.

Sources

  1. Legal Information Institute, Cornell Law School — https://www.law.cornell.edu/wex/double_jeopardy
    Supports: U.S. definition, Fifth Amendment basis, incorporation to state governments, criminal nature of the protection
  2. Department of Justice Canada — https://www.justice.gc.ca/eng/csj-sjc/rfc-dlc/ccrf-ccdl/check/art11h.html
    Supports: Canadian section 11(h) protection, purpose, final acquittal/conviction rule, Kienapple principle
  3. legislation.gov.uk — https://www.legislation.gov.uk/ukpga/1983/30/section/54
    Supports: Not used; no UK rule included in final facts
  4. Library of Congress, Constitution Annotated — https://constitution.congress.gov/browse/essay/amdt5-3-1/ALDE_00000858/
    Supports: Text and interpretation of the U.S. Double Jeopardy Clause, scope and punishment-related limits