Frye v. United States

Introduction to Criminal Law

  • Focus: U.S. criminal law and court systems, specifically focusing on the evolution of standards for evidence admissibility since the early 20th century.

  • Limitations: The lecturer doesn't cover evidentiary law in all countries due to time and expertise constraints. Coverage focuses heavily on federal standards and their adoption by state courts.

  • Background Knowledge: Expected from U.S. students on the structure of the Constitution, the incorporation doctrine, and relevant amendments from the Bill of Rights (e.g., Fourth, Fifth, and Sixth Amendments) pertaining to criminal procedure.

Legal Precedents for Evidence Admissibility

  • Importance of understanding the foundations of evidence admissibility in court, particularly concerning novel scientific or technical expertise. These cases and rules define the limits of what juries can hear.

  • Three key legal precedents referenced, illustrating the shift from a community consensus model to a judicial gatekeeping model:

    • Fry v. United States (1923): Established the "general acceptance" test.

    • Federal Rules of Evidence (1975): Provided a foundation for reliability and relevance.

    • Daubert v. Merrell Dow Pharmaceuticals, Inc. (1993): Articulated the specific criteria for judicial vetting of scientific evidence.

Fry v. United States (1923)

  • Established the requirement for the general acceptance of scientific evidence.

    • Definition: Evidence derived from novel scientific principles must be widely accepted by the relevant scientific community before being deemed admissible in a court of law. The threshold for admissibility is based on the consensus of experts, not solely the judge's assessment of reliability.

    • Sometimes referred to as the general acceptance test case or the Frye standard.

  • Historical Context:

    • Fry's case involved the admissibility of a systolic blood pressure deception test (a precursor to the modern polygraph or lie detector test). This device monitored changes in blood pressure, based on the theory that telling a lie causes a measurable physiological response.

    • Fry confessed to a second degree murder but later recanted his admission, claiming the confession was involuntary.

  • Court's Ruling (D.C. Circuit Court of Appeals):

    • The court ruled that the deception test was not admissible because the scientific principle behind it
      The correlation between blood pressure changes and deception
      had not yet gained sufficient scientific standing or recognition in the medical and physiological community.

    • This exclusion affirmed Fry's conviction, highlighting the court's cautious approach to novel scientific techniques.

  • Impact:

    • The standard set by Frye was the predominant rule for admissibility in determining the reliability of scientific evidence and was adopted by nearly all state and federal courts until the implementation of the Federal Rules of Evidence and the subsequent Daubert ruling in federal jurisdiction.

    • Any evidence presented, particularly expert testimony relying on a scientific method, must demonstrate general acceptance within the relevant scientific community.

Case Details of Fry v. United States

  • Overview of the Incident:

    • The victim, Dr. Brown, was shot in his home in Washington D.C. in 1920.

    • Eyewitness details were vague, and physical evidence was lacking, leading to initial investigation dead ends.

  • Fry's Arrest and Confession:

    • Initially arrested for unrelated crimes; later confessed to the murder claiming self-defense after being interrogated. He later recanted, alleging the confession was coerced or he misunderstood his constitutional rights.

    • Lack of physical evidence directly linking him to the crime made the resolution heavily reliant on testimonial evidence.

  • Expert Testimony:

    • Fry's defense sought to introduce expert testimony from Dr. William Marston, a psychologist and inventor of the systolic blood pressure deception test. Marston intended to testify that Fry's deception test results proved he was telling the truth when he recanted his confession.

    • The introduction of this novel scientific method, based on fledgling psychological principles, was denied by the trial judge.

  • Judge's Decision:

    • The judge allowed the presentation of Marston

    s credentials briefly but ultimately disallowed his specific testimony regarding the test results due to the lack of established scientific standards and general acceptance of the method. The court emphasized that the scientific principle must have passed "the experimental stage" and gained "common recognition."

    • The decision was based on the premise that lie detection techniques were considered experimental and not widely recognized or validated in court settings.

  • Outcome:

    • The initial ruling left the door open for science to eventually meet the required standard.

    • While the test results were formally excluded, legal historians suggest the jury was still aware of the attempted introduction of the lie detector testimony, which might have contributed to Fry's charge being ultimately downgraded from first-degree to second-degree murder, despite the exclusion of the scientific evidence.

Principles Established by Fry

  • Scientific evidence must be:

    • Generally accepted by the relevant scientific community. This status is typically demonstrated through publications in peer-reviewed literature, professional recognition, and widespread use among qualified experts in the field.

    • Contextual application of this standard includes examining previous judicial precedents, existing scientific literature, and the consensus among expert practitioners in the specific discipline.

  • Courts must determine:

    • Whether the underlying scientific principles and specific methods used in evidence gathering enjoy general acceptance among experts of the respective field before the evidence can be presented to the jury.

  • The character of the presented scientific information:

    • At the time of the ruling, the lie detection methodology was treated as a theoretical concept, untested, without prior sufficient judicial support or robust scientific validation, thus failing the Frye test.

Federal Rules of Evidence (1975)

  • Introduction of federal rules, particularly Rule 702, which governs testimony by expert witnesses. This framework stresses the trial judge's role in ensuring the relevance and reliability of expert testimony.

  • Rule 702 states that if scientific, technical, or specialized knowledge will help the trier of fact (jury or judge) understand the evidence or determine a fact in issue, a qualified expert may testify if the testimony is based on sufficient facts or data, is the product of reliable principles and methods, and the expert has reliably applied these principles and methods to the facts of the case.

  • This established a potentially broader framework for evaluating scientific evidence than Frye's strict general acceptance standard, although many jurisdictions initially interpreted Rule 702 alongside Frye.

Daubert v. Merrell Dow Pharmaceuticals, Inc. (1993)

  • Context: A challenge to the admissibility of expert testimony linking the drug Bendectin (used for morning sickness) to birth defects, based on epidemiological evidence not universally accepted by the scientific community.

  • Overturned the strict interpretation of Frye in federal courts.

    • Definition: The Supreme Court determined that general acceptance is not an absolute, necessary requirement for the admissibility of scientific evidence under the Federal Rules of Evidence (FRE). FRE Rule 702 superseded Frye.

    • Empowered trial judges to act as "gatekeepers" to ensure expert evidence is not only relevant (assisting the trier of fact) but also reliable (scientifically valid).

  • Influential Daubert Factors (Criteria for Reliability): Trial courts are encouraged to consider several non-exhaustive factors when assessing scientific validity:

    • 1. Testability: Whether the theory or technique can be (or has been) tested.

    • 2. Peer Review and Publication: Whether the theory or technique has been subjected to peer review and publication.

    • 3. Error Rate: Known or potential rate of error.

    • 4. Maintenance of Standards: Existence and maintenance of standards controlling the technique's operation.

    • 5. General Acceptance: The degree of acceptance within the relevant scientific community (retaining Frye's general acceptance as one factor, but not the sole dispositive one).

  • Sets a new standard (the Daubert standard) which significantly changed how federal courts assess scientific evidence in practice, emphasizing judicial inquiry into the scientific methodology, validity, and rigor, rather than relying solely on community consensus. This standard expanded the types of reliable scientific evidence that could be admitted.