In-depth Notes on Relevance, Witness Types, and Trial Process

Chapter 1: Introduction to Relevance in Evidence

  • Relevance of evidence is crucial in court.
    • Definition: Evidence is relevant if it has any tendency to make a fact more or less probable.
    • Importance of evidence relates to determining the significance of issues at hand (e.g., eyewitness testimony, alibi validation).
    • General Rule: Relevant evidence will be admitted unless exceptions apply under constitutional or statutory rules.
    • Exceptions: If evidence is irrelevant, it can confuse the jury and cloud their judgment.

Types of Witnesses

  • Witnesses can be categorized into two types:

    1. Lay Witnesses:
    • Do not have specialized knowledge.
    • Can offer opinions based on their observations (e.g., estimating speed of a vehicle, guessing age).
    1. Expert Witnesses:
    • Possess specialized knowledge (e.g., DNA experts, fingerprint analysts).
    • Can render opinions based on scientific knowledge and training, which lay witnesses cannot.

  • Lay Witness Opinions:

    • Must be rationally based on the witness' perception and helpful in assisting the jury.
    • Examples include:
    • Opinion about how fast a car was going.
    • Estimation of someone's age.

Chapter 2: Lay Witness Opinion Explained

  • When assessing lay witness opinions, consider:
    • Is the opinion based on the witness's perception?
    • Will the opinion assist the jury in understanding the case?
    • The opinion cannot be based on scientific or specialized knowledge.

Chapter 3: Expert Testimony Requirements

  • Expert testimony has specific criteria to be admissible:
    1. Knowledge must aid in understanding an issue.
    2. Testimony must be based on sufficient facts, not hypothetical scenarios.
    3. Principles employed must be reliable and should have been applied to the case.
    4. Frye Standard: Established requirement for advanced scientific principles to have acceptance in the field.
    5. Daubert Standard: An updated standard that emphasizes testing, peer review, and general acceptance in the scientific community.

Chapter 4: The Role of the Expert Witness

  • Voir Dire Process:
    • Process to qualify experts in court via a series of questions.
    • Assess the expert's experience, education, and whether they stay current in their field.
    • Only after being accepted can they testify about the specific case.

Chapter 5: Trial Phase Overview

  • Phases of trial:
    1. Jury Selection:
    • 12 jurors + 2 alternates.
    1. Opening Statements:
    • Prosecution presents first due to burden of proof (beyond a reasonable doubt).
  1. Evidence Presentation: Prosecution presents all evidence before the defense does theirs.

Chapter 6: Witness Examination Techniques

  • Direct Examination:
    • Attorney asks open-ended questions to their witness.
  • Cross Examination:
    • The opposing attorney questions the witness based on prior topics discussed.
    • This is limited to what has been addressed on direct.

Chapter 7: Conclusion on Witness Questioning

  • Effective questioning includes:

    • Direct Questions: Open-ended, allowing witnesses to provide a detailed narrative.
    • Leading Questions: Imply the answer within the question, typically used on cross-examination.

  • Importance of documentation and clarity when describing witness qualifications and testimonies, including how to handle documentary evidence (state's or defense's exhibit).