Evidence Commons^™

Junk Philosophy Of Science?: The Paradox Of Expertise And Interdisciplinarity In Federal Courts, David S. Caudill, Richard E. Redding

David S Caudill

No abstract provided.

Developments In The Law Of Scientific Evidence: The Admissibility Of Polygraph Evidence, Sheila K. Hyatt

Journal of the National Association of Administrative Law Judiciary

No abstract provided.

Confronting Science: Expert Evidence And The Confrontation Clause, David H. Kaye, Jennifer L. Mnookin

Journal Articles

In Crawford v Washington, the Supreme Court substantially changed its understanding of how the Confrontation Clause applies to hearsay evidence. Since then, the Court has issued three bitterly contested expert-evidence-related Confrontation Clause decisions, and each one has generated at least as many questions as answers. This article analyzes this trilogy of cases, especially the most recent, Williams v Illinois.

In Williams, the Court issued a bewildering array of opinions in which majority support for admitting the opinion of a DNA analyst about tests that she did not perform was awkwardly knitted together out of several incompatible doctrinal …

Being Pragmatic About Forensic Linguistics, Edward K. Cheng

Vanderbilt Law School Faculty Publications

This article aims to provide some legal context to the Authorship Attribution Workshop (“conference”). In particular, I want to offer some pragmatic observations on what courts will likely demand of forensic linguistics experts and tentatively suggest what the field should aspire to in both the short and long run.

Speaking Science To Law, Deborah Hussey Freeland

Deborah M. Hussey Freeland

involving a strong scientific consensus, the powerful qualities of scientific knowledge are easily lost in translation. Moreover, even prominent scientists who are committed to providing accurate information to legal fact-finders may suffer reputational harm simply for participating in an adversarial process.

This article analyzes the connection between law and science through the expert witness from the perspectives of epistemology and cross-cultural communication, focusing on the distinct ways in which scientists and lawyers know, value and express their knowledge. When a lawyer meets with a scientific expert witness, more confusion attends their interaction than either likely realizes. Linguistic translation is necessary--but …

The 2009 Nas Forensic Science Report: A Literature Review, Paul C. Giannelli

Faculty Publications

In February 29, the National Academy of Sciences (NAS) released its report on forensic science: Strengthening Forensic Science in the United States: A Path Forward (29). The popular press immediately trumpeted the report’s release, with headlines such as (1) “Report Urges Overhaul of Crime Lab System,” (2) “Real-life Police Forensics Don’t Resemble ‘CSI’: Reliability is ‘Low or Non-existent,’ Report Finds” and (3) “Science Found Wanting in Nation’s Crime Labs.”

Within three months of its publication, Justice Scalia cited the report in a Supreme Court decision, writing: “Forensic evidence is not uniquely immune from the risk of manipulation. . . Serious …

Kumho Tire Co. V. Carmichael: The Supreme Court Follows Up On The Daubert Test, Martin A. Schwartz

Martin A. Schwartz

No abstract provided.

Brain Scans As Evidence: Truths, Proofs, Lies, And Lessons, Owen D. Jones, Francis X. Shen

Vanderbilt Law School Faculty Publications

This contribution to the Brain Sciences in the Courtroom Symposium identifies and discusses issues important to admissibility determinations when courts confront brain-scan evidence. Through the vehicle of the landmark 2010 federal criminal trial U.S. v. Semrau (which considered, for the first time, the admissibility of brain scans for lie detection purposes) this article highlights critical evidentiary issues involving: 1) experimental design; 2) ecological and external validity; 3) subject compliance with researcher instructions; 4) false positives; and 5) drawing inferences about individuals from group data. The article’s lessons are broadly applicable to the new wave of neurolaw cases now being seen …

Who Must Testify To The Results Of A Forensic Laboratory Test? Bullcoming V. New Mexico, Richard D. Friedman

Articles

Does the Confrontation Clause permit the prosecution to introduce a forensic laboratory report through the in-court testimony of a supervisor or other person who did not perform or observe the reported test?

Twenty-First Century Forensic Science Challenges For Trial Judges In Criminal Cases: Where The "Polybutadiene" Meets The "Bitumen", Hon. Donald E. Shelton

Hon. Donald E. Shelton

This artice discusses the challenges faced by trial judges in crimnal cases in fulfilling their Daubert "gatekeeping" role in the face of rapid advancements in forensic science. Admissibility questions for various forms of scientific evidence are reviewed, from DNA to fingerprints to social science "syndrome" evidence. The article discusses the pretrial issues presented by DNA databases, search issues and limitations problems as well as the impact of forensic science developments on juror expectations. Finally, forensic science issues regarding trial conduct are discussed, including voir dire, arguments and jury instructions,

An Indirect-Effects Model Of Mediated Adjudication: The Csi Myth, The Tech Effect, And Metropolitan Jurors' Expectations For Scientific Evidence, Hon. Donald E. Shelton, Young S. Kim, Gregg Barak

Vanderbilt Journal of Entertainment & Technology Law

Part I of this article defines the "CSI effect," a phrase has come to have many different meanings ascribed to it. It emphasizes the epistemological importance of first describing the effect of the "CSI effect" as observed in juror behavior documented in a new study conducted in Wayne County (Detroit), Michigan, and then looking at causative factors that may be related to an explanation of those observed effects. Part II describes the methodology of the Wayne County study, provides a descriptive analysis of Wayne County jurors, and compares the jurors demographically to the Washtenaw County jurors who were surveyed in …

Science On Trial, Valerie P. Hans

Cornell Law Faculty Publications

The increasing complexity of both criminal and civil jury trials raises a host of issues for lawyers and judges. For the litigator, the first question is whether a jury can be trusted with a case that turns on highly technical evidence. For the trial judge, there are decisions about the admissibility of expert testimony, whether it is based on sound science, and whether a jury is likely to be misled by scientific claims. Should the judge permit jury innovations such as note taking, question asking, and juror discussions of evidence during the trial, hoping to increase jury comprehension of the …

Statistics In The Jury Box: How Jurors Respond To Mitochondrial Dna Match Probabilities, David H. Kaye, Valerie P. Hans, B. Michael Dann, Erin J. Farley, Stephanie Albertson

Cornell Law Faculty Publications

This article describes parts of an unusually realistic experiment on the comprehension of expert testimony on mitochondrial DNA (mtDNA) sequencing in a criminal trial for robbery. Specifically, we examine how jurors who responded to summonses for jury duty evaluated portions of videotaped testimony involving probabilities and statistics. Although some jurors showed susceptibility to classic fallacies in interpreting conditional probabilities, the jurors as a whole were not overwhelmed by a 99.98% exclusion probability that the prosecution presented. Cognitive errors favoring the defense were more prevalent than ones favoring the prosecution. These findings lend scant support to the legal argument that mtDNA …

Revisiting 'Dreyfus': A More Complete Account Of A Trial By Mathematics, David H. Kaye

Journal Articles

Legal literature and case law depicts the infamous conviction of Alfred Dreyfus for treason and espionage in 1899 as a prime example of the irresistible power of even grossly fallacious mathematical demonstrations to overwhelm a legal tribunal. This essay shows that Dreyfus is not a case of mathematics run amok, unchecked and uncomprehended. To the contrary, the defects in the mathematical proof were dramatically exposed, and this evidence did not lead Dreyfus's judges to condemn him. This history undercuts the reliance of modern courts and commentators on Dreyfus as an indication or illustration of the alleged dangers of probability evidence …

Judges, Juries, And Scientific Evidence, Valerie P. Hans

Cornell Law Faculty Publications

The rise in scientific evidence offered in American jury trials, along with court rulings thrusting judges into the business of assessing the soundness of scientific evidence, have produced challenges for judge and jury alike. Many judges have taken up the duty of becoming “amateur scientists.” But what about juries? Surely they too could benefit from assistance as they attempt to master and apply complex testimony about scientific matters during the course of a trial. Concerns about the jury’s ability to understand, critically evaluate, and employ scientific evidence in deciding complex trials have led to many suggestions for reform.

This article …

Bite Mark Analysis, Paul C. Giannelli

Faculty Publications

Courts have admitted bite mark comparison evidence in homicide, rape, and child abuse cases. By the 1980s, the technique had gained widespread judicial acceptance. Hundreds of cases have admitted this type of evidence, and no reported case has rejected it. Moreover, some courts speak of bite mark comparison as a "science." Indeed, its acceptance is so well-established that several courts have taken judicial notice of its reliability, implying that the validity of the technique is not subject to reasonable dispute.

Yet, the scientific foundations for bite mark comparisons has never been demonstrated. Such basic issues as the uniqueness of the …

Independent Judicial Research In The "Daubert" Age, Edward K. Cheng

Vanderbilt Law School Faculty Publications

The Supreme Court's Daubert trilogy places judges in the unenviable position of assessing the reliability of often unfamiliar and complex scientific expert testimony. Over the past decade, scholars have therefore explored various ways of helping judges with their new gatekeeping responsibilities. Unfortunately, the two dominant approaches, which focus on doctrinal tests and external assistance mechanisms, have been largely ineffective. This Article advocates for a neglected but important method for improving scientific decision making-independent judicial research. It argues that judges facing unfamiliar and complex scientific admissibility decisions can and should engage in independent library research to better educate themselves about the …

Can Jury Trial Innovations Improve Juror Understanding Of Dna Evidence?, B. Michael Dann, Valerie P. Hans, David H. Kaye

Cornell Law Faculty Publications

A single spot of blood on a pink windowsill will tell investigators who broke a windowpane, turned a lock, and kidnapped 2-year-old Molly Evans from her bedroom in the middle of the night. An expert witness will testify that the DNA profile of the blood evidence recovered from the windowsill was entered into CODIS, an electronic database of DNA profiles. That process yielded a “hit,” identifying the defendant as the most likely source of the blood inside Molly’s room.

But will jurors be able to understand the expert’s intricate analysis and use it to reach a verdict? And what—if any—steps …

Same Old, Same Old: Scientific Evidence Past And Present, Edward K. Cheng

Michigan Law Review

For over twenty years, and particularly since the Supreme Court's Daubert decision in 1993, much ink has been spilled debating the problem of scientific evidence in the courts. Are jurors or, in the alternative, judges qualified to assess scientific reliability? Do courts really need to be concerned about "junk science"? What mechanisms can promote better decision making in scientific cases? Even a cursory scan of the literature shows the recent explosion of interest in these issues, precipitating new treatises, hundreds of articles, and countless conferences for judges, practitioners, and academics. To this literature, Professor Tal Golan adds Laws of Men …

Cheating The Constitution, Pamela R. Metzger

Faculty Journal Articles and Book Chapters

It is black letter constitutional law: To prove a criminal offense, the prosecution must prove every element of the offense, by proof beyond a reasonable doubt, and the constitution entitles a defendant to confront and cross-examine all witnesses against him. Yet, for the past thirty years, state legislatures have quietly approved laws that cheat the constitution. By that, I mean that these laws fly, undetected, beneath the constitutional radar while violating fundamental constitutional rights.

Although other constitutional cheats abound, in this article I consider one archetypical cheat: statutes that permit state prosecutors to use hearsay state crime laboratory reports, in …

A Study Of Juror Expectations And Demands Concerning Scientific Evidence: Does The "Csi Effect" Exist?, Hon. Donald E. Shelton, Young S. Kim, Gregg Barak

Vanderbilt Journal of Entertainment & Technology Law

This article is the first empirical study of jurors designed to investigate the existence and extent of the "CSI effect." The authors conducted a survey of 1027 persons who had been called for jury duty in a Michigan state court during a nine-week period in June, July and August, 2006. This survey examined the summoned jurors' demographic information, television viewing habits, their expectations that the prosecutor would produce scientific evidence and whether they would demand scientific evidence as a condition of a guilty verdict.

This study of juror expectations and demands about scientific evidence in relationship to other types of …

Testing Jury Reforms, Valerie P. Hans, B. Michael Dann, David H. Kaye, Erin J. Farley, Stephanie Albertson

Cornell Law Faculty Publications

DNA evidence has become a key law enforcement tool and is increasingly presented in criminal trials in Delaware and elsewhere. The integrity of the criminal trial process turns upon the jury's ability to understand DNA evidence and to evaluate properly the testimony of experts. How well do they do? Can we assist them in the process?

Bayes' Law, Sequential Uncertainties, And Evidence Of Causation In Toxic Tort Cases, Neal C. Stout, Peter A. Valberg

University of Michigan Journal of Law Reform

Judges are the gatekeepers of evidence. Arguably, the most difficult duty for a judicial gatekeeper is to screen the reliability of expert opinions in scientific fields such as medicine that are beyond the ken of most judges. Yet, judges have a duty to scrutinize such expert opinion evidence to determine its reliability and admissibility. In toxic tort cases, the issue of causation-whether the alleged exposures actually caused the plaintiffs injury-is nearly always the central dispute, and determining admissibility of expert causation opinion is a daunting challenge for most judges. We present a comprehensive review of the courts' struggles with the …

Testimonial Or Nontestimonial? The Admissibility Of Forensic Evidence After Crawford V. Washington, John M. Spires

Kentucky Law Journal

No abstract provided.

Mitochondrial Dna: Emerging Legal Issues, Edward K. Cheng

Vanderbilt Law School Faculty Publications

This article will briefly survey some of the current and emerging legal issues surrounding mtDNA evidence. Parts I and II discuss basic evidentiary questions, including mtDNA's reliability and admissibility under Daubert as well as the potential problem of jury confusion regarding the probative value of mtDNA. Part III considers the broader potential of mtDNA to supplant microscopic hair analysis, a technique often criticized for its subjectivity and high error rate. Finally, Part IV explores the unique privacy concerns raised by the maternal inheritance of mtDNA, specifically in the context of DNA databanks.

Does Frye Or Daubert Matter? A Study Of Scientific Admissibility Standards, Edward K. Cheng, Albert Yoon

Vanderbilt Law School Faculty Publications

Nearly every treatment of scientific evidence begins with a faithful comparison between the Frye and Daubert standards. Since 1993, jurists and legal scholars have spiritedly debated which standard is preferable and whether particular states should adopt one standard or the other. These efforts beg the question: Does a state's choice of scientific admissibility standard matter? A growing number of scholars suspect that the answer is no. Under this theory, the import of the Supreme Court's Daubert decision was not in its doctrinal standard, but rather in the general consciousness it raised about the problems of unreliable scientific evidence. This Article …

Expert Testimony And Scientific Evidence, Lynn Mclain

All Faculty Scholarship

Handout from a day-long lecture on expert and scientific testimony at the Maryland Judicial Institute.

Post-Trilogy Science In The Courtroom, Part Ii: What Are The Judges Still Doing?, David S. Caudill, Lewis H. Larue

Scholarly Articles

Not available.

Misuse Of Scientific Evidence By Prosecutors, Bennett L. Gershman

Elisabeth Haub School of Law Faculty Publications

The prosecutor's misuse of scientific evidence to charge and convict has not been sufficiently examined. Courts and commentators critiquing abuses of scientific evidence in criminal cases rarely focus on the prosecutor's role in the process. Issues typically discussed are the questionable nature of the evidence, the controversial manner in which the evidence was acquired and tested, whether the expert arrived at her conclusions in a scientifically reliable manner, and whether the expert's courtroom testimony was false or misleading. The prosecutor's control over and manipulation of the scientific evidence to shape the fact-finder's evaluation of the facts and to persuade the …

Daubert Asks The Right Questions: Now Appellate Courts Should Help Find The Right Answers, Christopher B. Mueller

Publications

No abstract provided.