Wyoming Rules of Evidence

The Wyoming rules of evidence govern proceedings in the courts of this state.  The objective of the rules of evidence is to secure fairness in administration, eliminate unjustifiable expense and delay, and promote growth and development of the law of evidence.

Generally, the rules of evidence are procedural and not substantive.  These rules are not intended to change, modify or enlarge a statute.  The rules apply to all actions and proceedings in the courts of Wyoming.  The rules other than those with respect to privileges do not apply in situations such as:

  • Preliminary questions of fact;
  • Proceedings before grand juries;
  • Miscellaneous proceedings such as proceedings for extradition or rendition; preliminary examination in criminal cases; sentencing, granting or revoking probation other than adjudicatory hearings; juvenile proceedings other than adjudicatory hearings; issuance of warrants for arrest, criminal summonses, and search warrants; and proceedings with respect to release on bail or otherwise; and
  • Contempt proceedings in which the court may act summarily.

Table of Contents of Wyoming Rules of Evidence

    Adoption Order. 

 I. GENERAL PROVISIONS

    Rule 101. Scope. 

    Rule 102. Purpose and construction.

    Rule 103. Rulings on evidence.

    Rule 104. Preliminary questions.

    Rule 105. Limited admissibility.

    Rule 106. Remainder of or related writings or recorded statements.

II. JUDICIAL NOTICE

    Rule 201. Judicial notice of adjudicative facts.

III. PRESUMPTIONS

    Rule 301. Presumptions in general in civil actions and proceedings.

    Rule 302. Applicability of federal law in civil actions and proceedings.

    Rule 303. Presumptions in criminal cases.

IV. RELEVANCY AND ITS LIMITS

    Rule 401. Definition of “relevant evidence”.

    Rule 402. Relevant evidence generally admissible; irrelevant evidence inadmissible.

    Rule 403. Exclusion of relevant evidence on grounds of prejudice, confusion, or waste of time.

    Rule 404. Character evidence not admissible to prove conduct; exceptions; other crimes.

    Rule 405. Methods of proving character.

    Rule 406. Habit; routine practice.

    Rule 407. Subsequent remedial measures.

    Rule 408. Compromise and offers to compromise.

    Rule 409. Payment of medical and similar expenses.

    Rule 410. Withdrawn pleas and offers.

    Rule 411. Liability insurance.

V. PRIVILEGES

    Rule 501. General rule.

VI. WITNESSES

    Rule 601. General rule of competency.

    Rule 602. Lack of personal knowledge.

    Rule 603. Oath or affirmation.

    Rule 604. Interpreters.

    Rule 605. Competency of judge as witness.

    Rule 606. Competency of juror as witness.

    Rule 607. Who may impeach.

    Rule 608. Evidence of character and conduct of witness.

    Rule 609. Impeachment by evidence of conviction of crime.

    Rule 610. Religious beliefs or opinions.

    Rule 611. Mode and order of interrogation and presentation.

    Rule 612. Writing or object used to refresh memory.

    Rule 613. Prior statements of witnesses.

    Rule 614. Calling and interrogation of witnesses by court.

    Rule 615. Exclusion of witnesses.

VII. OPINIONS AND EXPERT TESTIMONY

    Rule 701. Opinion testimony by lay witnesses.

    Rule 702. Testimony by experts.

    Rule 703. Bases of opinion testimony by experts.

    Rule 704. Opinion on ultimate issue.

    Rule 705. Disclosure of facts or data underlying expert opinion.

    Rule 706. Court-appointed experts.

VIII. HEARSAY

    Rule 801. Definitions.

    Rule 802. Hearsay rule.

    Rule 803. Hearsay exceptions; availability of declarant immaterial.

    Rule 804. Hearsay exceptions; declarant unavailable.

    Rule 805. Hearsay within hearsay.

    Rule 806. Attacking and supporting credibility of declarant.

IX. AUTHENTICATION AND IDENTIFICATION

    Rule 901. Requirement of authentication or identification.

    Rule 902. Self-authentication.

    Rule 903. Subscribing witness’ testimony unnecessary.

 X. CONTENTS OF WRITINGS, RECORDINGS, AND PHOTOGRAPHS .

 X. CONTENTS OF WRITINGS, RECORDINGS, AND PHOTOGRAPHS

    Rule 1001. Definitions.

    Rule 1002. Requirement of original.

    Rule 1003. Admissibility of duplicates.

    Rule 1004. Admissibility of other evidence of contents.

    Rule 1005. Public records.

    Rule 1006. Summaries. 

    Rule 1007. Testimony or written admission of party.

    Rule 1008. Functions of court and jury.

XI. MISCELLANEOUS RULES

    Rule 1101. Applicability of rules.

    Rule 1102. Statutes superseded.

    Rule 1103. Title.

    Rule 1104. Effective date.

Wyoming Rules of Evidence


Inside Wyoming Rules of Evidence