Evidence Commons^™

Law, Fact, And Procedural Justice, G. Alexander Nunn

Faculty Scholarship

The distinction between questions of law and questions of fact is deceptively complex. Although any first-year law student could properly classify those issues that fall at the polar ends of the law-fact continuum, the Supreme Court has itself acknowledged that the exact dividing line between law and fact—the point where legal inquiries end and factual ones begin—is “slippery,” “elusive,” and “vexing.” But identifying that line is crucially important. Whether an issue is deemed a question of law or a question of fact often influences the appointment of a courtroom decision maker, the scope of appellate review, the administration of certain …

Junk Science At Sentencing, Maneka Sinha

Faculty Scholarship

Junk science used in criminal trials has contributed to hundreds of wrongful convictions. But the problem is much worse than that. Junk science does not only harm criminal defendants who go to trial, but also the overwhelming majority of defendants—over ninety-five percent—who plead guilty, skip trial, and proceed straight to sentencing.

Scientific, technical, and other specialized evidence (“STS evidence”) is used regularly, and with increasing frequency, at sentencing. Despite this, Federal Rule of Evidence 702 and its state equivalents—which help filter unreliable STS evidence at trials—do not apply at the critical sentencing stage. In fact, at sentencing, no meaningful admissibility …

The Easterbrook Theorem: An Application To Digital Markets, Joshua D. Wright, Murat C. Mungan

Faculty Scholarship

The rise of large firms in the digital economy, including Amazon, Apple, Facebook, and Google, has rekindled the debate about monopolization law. There are proposals to make finding liability easier against alleged digital monopolists by relaxing substantive standards; to flip burdens of proof; and to overturn broad swaths of existing Supreme Court precedent, and even to condemn a law review article. Frank Easterbrook’s seminal 1984 article, The Limits of Antitrust, theorizes that Type I error costs are greater than Type II error costs in the antitrust context, a proposition that has been woven deeply into antitrust law by the Supreme …

Privacy As Privilege: The Stored Communications Act And Internet Evidence, Rebecca Wexler

Faculty Scholarship

This Article exposes a profound and growing injustice that major technology companies have propagated through every level of the judiciary under the guise of protecting data privacy. The Supreme Court has repeatedly proclaimed: “In our judicial system, the public has a right to every [person’s] evidence.” Yet, for over a decade, Facebook, GitHub, Google, Instagram, Microsoft, and Twitter have leveraged the Stored Communications Act (SCA) — a key data privacy law for the internet — to bar criminal defendants from subpoenaing the contents of another’s online communications, even when those communications could exonerate the wrongfully accused. Every appellate court to …

Artificial Intelligence As Evidence, Paul W. Grimm, Maura R. Grossman, Gordon V. Cormack

Faculty Scholarship

This article explores issues that govern the admissibility of Artificial Intelligence (“AI”) applications in civil and criminal cases, from the perspective of a federal trial judge and two computer scientists, one of whom also is an experienced attorney. It provides a detailed yet intelligible discussion of what AI is and how it works, a history of its development, and a description of the wide variety of functions that it is designed to accomplish, stressing that AI applications are ubiquitous, both in the private and public sectors. Applications today include: health care, education, employment-related decision-making, finance, law enforcement, and the legal …

Discovery Of Expert Reports And Testimony In Criminal Cases, Paul W. Grimm

Faculty Scholarship

No abstract provided.

The Costs And Benefits Of Forensics, Brandon L. Garrett

Faculty Scholarship

Supreme Court Justice Louis Brandeis famously wrote that states can be laboratories for experimentation in law and policy. Disappointingly, however, the actual laboratories that states and local governments run are not a home for experimentation. We do not have adequate information about either the costs or the benefits of forensic testing or allocation of resources. Increased spending and expansion of crime laboratories has perversely accompanied growing backlogs. Poor quality control has resulted in a series of audits and even closures of crime laboratories. In response to these problems, however, some laboratories and some entire states have developed new approaches toward …

Anticipating Venezuela's Debt Crisis: Hidden Holdouts And The Problem Of Pricing Collective Action Clauses, Robert E. Scott, Stephen J. Choi, Mitu Gulati

Faculty Scholarship

A creditor who asks for stronger enforcement rights upon its debtor’s default will rationally accept a lower interest rate reflecting the greater expected recovery the exercise of those rights provides. Over a dozen studies, however, have failed to document this basic relationship in the context of the collective action clause, a key provision in sovereign bonds. We conjecture that this failure is because enforcing the rights in question requires collective decision-making among anonymous creditors with different interests, impeding market predictions regarding future price effects. The pricing of rights that require collective enforcement thus turns on whether the market observes an …

Harassment, Workplace Culture, And The Power And Limits Of Law, Suzanne B. Goldberg

Faculty Scholarship

This article asks why it remains so difficult for employers to prevent and respond effectively to harassment, especially sexual harassment, and identifies promising points for legal intervention. It is sobering to consider social-science evidence of the myriad barriers to reporting sexual harassment – from the individual-level and interpersonal to those rooted in society at large. Most of these are out of reach for an employer but workplace culture stands out as a significant arena where employers have influence on whether harassment and other discriminatory behaviors are likely to thrive. Yet employers typically make choices in this area with attention to …

Conference On Best Practices For Managing Daubert Questions, Daniel J. Capra, David G. Campbell, Debra A. Livingston, James P. Bassett, Shelly Dick, Traci L. Lovitt, Thomas Marten, Kathryn N. Nester, Thomas D. Schroeder, Elizabeth J. Shapiro, Timothy Lau, Vince Chhabria, John Z. Lee, William H. Orrick Iii, Edmund A. Sargus Jr., Sarah A. Vance, Edward K. Cheng

Faculty Scholarship

This article is a transcript of the Philip D. Reed Lecture Series Conference on Best Practices for Managing Daubert Questions, held on October 25, 2019, at Vanderbilt Law School under the sponsorship of the Judicial Conference Advisory Committee on Evidence Rules. The transcript has been lightly edited and represents the panelists’ individual views only and in no way reflects those of their affiliated firms, organizations, law schools, or the judiciary.

Discrete Rent-Seeking Games With An Application To Evidence Production, Giuseppe Dari-Mattiacci, Lewis A. Kornhauser

Faculty Scholarship

Evidence production at trial, the accumulation of patents in a technological race, and lobbying are contests that often involve strategic choices over a discrete set of options. The literature has primarily focused on games with continuous effort choices. We fill this gap by studying a rent-seeking game with discrete effort choices and, for a significant class of games, derive a transformation rule that allows one to find the equilibrium of the discrete game from the equilibrium of the continuous game, which is much simpler to identify. We also discuss the limits of this approach and how well the continuous game …

Judging Eyewitness Evidence, Brandon L. Garrett

Faculty Scholarship

No abstract provided.

Beyond The Witness: Bringing A Process Perspective To Modern Evidence Law, Edward K. Cheng, G. Alexander Nunn

Faculty Scholarship

The focal point of the modern trial is the witness. Witnesses are the source of observations, lay and expert opinions, authentication, as well as the conduit through which documentary, physical, and scientific evidence is introduced. Evidence law therefore unsurprisingly concentrates on – or perhaps obsesses over – witnesses. In this Article, we argue that this witness-centered perspective is antiquated and counterproductive. As a historical matter, focusing on witnesses may have made sense when most evidence was the product of individual observation and action. But the modern world frequently features evidence produced through standardized, objective, and even mechanical processes that largely …

The Disappointing History Of Science In The Courtroom: Frye, Daubert, And The Ongoing Crisis Of “Junk Science” In Criminal Trials, Jim Hilbert

Faculty Scholarship

Twenty-five years ago, the Supreme Court decided one of the most important cases concerning the use of science in courtrooms. In Daubert v. Merrell Dow Pharmaceuticals , the Court addressed widespread concerns that courts were admitting unreliable scientific evidence. In addition, lower courts lacked clarity on the status of the previous landmark case for courtroom science, Frye v. United States. In the years leading up to the Daubert decision, policy-makers and legal observers sounded the alarm about the rise in the use of "junk science" by so-called expert witnesses. Some critics went so far as to suggest that American businesses …

Immigration Unilateralism And American Ethnonationalism, Robert L. Tsai

Faculty Scholarship

This paper arose from an invited symposium on "Democracy in America: The Promise and the Perils," held at Loyola University Chicago School of Law in Spring 2019. The essay places the Trump administration’s immigration and refugee policy in the context of a resurgent ethnonationalist movement in America as well as the constitutional politics of the past. In particular, it argues that Trumpism’s suspicion of foreigners who are Hispanic or Muslim, its move toward indefinite detention and separation of families, and its disdain for so-called “chain migration” are best understood as part of an assault on the political settlement of the …

The Inability To Self-Diagnose Bias, Christopher Robertson

Faculty Scholarship

The Constitution guarantees litigants an 'impartial' jury, one that bases its judgment on the evidence presented in the courtroom, untainted by affiliations with the parties, racial animus, or media coverage that may include inadmissible facts, a one-sided portrayal, and naked opinion. Problems of juror bias arise in almost every trial – state and federal, civil and criminal - and the problem is most severe in the highest profile cases, where the need for accuracy and legitimacy in outcomes is most salient.

The Supreme Court has instructed courts to use a simple method to determine whether jurors are biased: ask them. …

Self-Policing: Dissemination And Adoption Of Police Eyewitness Policies In Virginia, Brandon L. Garrett

Faculty Scholarship

Professional policing organizations emphasize the importance of the adoption of sound police policies and procedures, but traditionally doing so has been left to individual agencies. State and local government typically does not closely regulate police, and neither federal constitutional rulings nor state law typically sets out in any detail the practices that police should follow. Thus, law enforcement agencies must themselves draft and disseminate policy. This paper presents the results of studies used to assess the adoption of eyewitness identification policies by law enforcement agencies in Virginia. Policymakers were focused on this problem because Virginia experienced a series of DNA …

Trade Openness And Antitrust Law, Anu Bradford, Adam S. Chilton

Faculty Scholarship

Openness to international trade and adoption of antitrust laws can both curb anti-competitive behavior. But scholars have long debated the relationship between the two. Some argue that greater trade openness makes antitrust unnecessary, while others contend that antitrust laws are still needed to realize the benefits of trade liberalization. Data limitations have made this debate largely theoretical to date. We study the relationship between trade and antitrust empirically using new data on antitrust laws and enforcement activities. We find that trade openness and stringency of antitrust laws are positively correlated from 1950 to 2010 overall, but the positive correlation disappears …

A "Bad Rap":R. V. Skeete And The Admissibility Of Rap Lyric Evidence, Ngozi Okidegbe

Faculty Scholarship

The use of accused-authored rap lyric evidence is no longer rare in Canadian criminal proceedings. Adduced by Crown prosecutors, rap lyrics written or co-written by an accused are increasingly used in criminal trials as evidence of the accused’s intent, knowledge, motive, identity, or confession to the commission of the specific offence charged. The practice is not without controversy. The introduction of an accused’s artistic work in the form of rap lyrics at trial engages trial fairness concerns. Without a keen awareness of the social and cultural context that produces rap music, trial actors risk inflating their probative value and underestimating …

Expert Witness Malpractice, Michael Flynn

Faculty Scholarship

No abstract provided.

Honesty Without Truth: Lies, Accuracy, And The Criminal Justice Process, Lisa Kern Griffin

Faculty Scholarship

Focusing on “lying” is a natural response to uncertainty but too narrow of a concern. Honesty and truth are not the same thing and conflating them can actually inhibit accuracy. In several settings across investigations and trials, the criminal justice system elevates compliant statements, misguided beliefs, and confident opinions while excluding more complex evidence. Error often results. Some interrogation techniques, for example, privilege cooperation over information. Those interactions can yield incomplete or false statements, confessions, and even guilty pleas. Because of the impeachment rules that purportedly prevent perjury, the most knowledgeable witnesses may be precluded from taking the stand. The …

Firearm-Mark Evidence: Looking Back And Looking Ahead, David H. Kaye

Faculty Scholarship

This article, written as a contribution to a festschrift for Paul Giannelli, surveys the development of the law on one type of feature-matching evidence that repeatedly attracted Professor Giannelli’s attention — “firearm-mark evidence.” By inspecting toolmarks on bullets or spent cartridge cases, firearms examiners can supply valuable information on whether a particular gun fired the ammunition in question. But the limits on this information have not always been respected in court, and a growing number of opinions have tried to address this fact.

The article explains how the courts have moved from a position of skepticism of the ability of …

How Daubert And Its Progeny Have Failed Criminalistics Evidence And A Few Things The Judiciary Could Do About It, David H. Kaye

Faculty Scholarship

A recent report of the President’s Council of Advisors on Science and Technology questioned the validity of several types of criminalistics identification evidence and recommended “a best practices manual and an Advisory Committee note, providing guidance to Federal judges concerning the admissibility under Rule 702 of expert testimony based on forensic feature-comparison methods.” This article supplies information on why and how judicial bodies concerned with possible rules changes—and courts applying the current rules—can improve their regulation of criminalistics identification evidence. First, it describes how courts have failed to faithfully apply Daubert v. Merrell Dow Pharmaceutical’s criteria for scientific validity to …

Life, Liberty, And Trade Secrets: Intellectual Property In The Criminal Justice System, Rebecca Wexler

Faculty Scholarship

The criminal justice system is becoming automated. At every stage, from policing to evidence to parole, machine learning and other computer systems guide outcomes. Widespread debates over the pros and cons of these technologies have overlooked a crucial issue: ownership. Developers often claim that details about how their tools work are trade secrets and refuse to disclose that information to criminal defendants or their attorneys. The introduction of intellectual property claims into the criminal justice system raises undertheorized tensions between life, liberty, and property interests.

This Article offers the first wide-ranging account of trade secret evidence in criminal cases and …

Racial Character Evidence In Police Killing Cases, Jasmine Gonzales Rose

Faculty Scholarship

The United States is facing a twofold crisis: police killings of people of color and unaccountability for these killings in the criminal justice system. In many instances, the officers’ use of deadly force is captured on video and often appears clearly unjustified, but grand and petit juries still fail to indict and convict, leaving many baffled. This Article provides an explanation for these failures: juror reliance on “racial character evidence.” Too often, jurors consider race as evidence in criminal trials, particularly in police killing cases where the victim was a person of color. Instead of focusing on admissible evidence, jurors …

Introduction: Symposium On “Forensics, Statistics, And Law”, Brandon L. Garrett

Faculty Scholarship

No abstract provided.

Challenges Facing Judges Regarding Expert Evidence In Criminal Cases, Paul W. Grimm

Faculty Scholarship

No abstract provided.

Using Prior Consistent Statements To Rehabilitate Credibility Or To Prove Substantive Assertions Before And After The 2014 Amendment Of Federal Rule Of Evidence 801(D)(1)(B), Floralynn Einesman

Faculty Scholarship

The Federal Rules of Evidence (FRE) expanded the non-hearsay category of admissible prior consistent statements with FRE 801(d)(1)(B)(ii) to include any statements counsel uses to rehabilitate a declarant’s credibility after that credibility has been attacked. FREV 801(d)(1)(B)(i) and (ii) require that a declarant testify and be subjected to cross-examination about the prior consistent statement. Under these rules, the time at which the declarant made the consistent statement and her reason for making it are critical.

When the declarant does not testify, however, under FRE 806 opposing counsel may still attack the declarant’s credibility. Under these circumstances, it is often challenging …

The Implied Assertion Doctrine Applied To Legislative History, Noah Marks, Jessica Ranucci

Faculty Scholarship

This Article derives a new approach towards the use of legislative history to interpret statutes by adapting and applying the law of evidence. Courts use legislative history as hearsay evidence: out-of-court statements used for the truth of the matter asserted. Evidence law includes many exceptions under which hearsay becomes admissible. One such exception, the implied assertion exception, can be applied to courts' use of legislative history. Under this framework, legislative history can illuminate the interpretive enterprise, while many of the problems identified by opponents of legislative history are mitigated. After presenting the development of the implied assertion doctrine in evidence …

The Fragile Promise Of Open-File Discovery, Ben Grunwald

Faculty Scholarship

Under traditional rules of criminal discovery, defendants are entitled to little prosecutorial evidence and are thus forced to negotiate plea agreements and prepare for trial in the dark. In an effort to expand defendants’ discovery rights, a number of states have recently enacted “open-file” statutes, which require the government to share the fruits of its investigation with the defense. Legal scholars have widely supported these reforms, claiming that they level the playing field and promote judicial efficiency by decreasing trials and speeding up guilty pleas. But these predictions are based largely on intuition and anecdotal data without extended theoretical analysis …