Evidence Commons^™

New Insights On Expert Opinion About Eyewitness Memory Research, Travis M. Seale-Carlisle, Adele Quigley-Mcbride, Jennifer E. F. Teitcher, William E. Crozier, Chad S. Dodson, Brandon L. Garrett

Faculty Scholarship

Experimental psychologists investigating eyewitness memory have periodically gathered their thoughts on a variety of eyewitness memory phenomena. Courts and other stakeholders of eyewitness research rely on the expert opinions reflected in these surveys to make informed decisions. However, the last survey of this sort was published more than 20 years ago, and the science of eyewitness memory has developed since that time. Stakeholders need a current database of expert opinions to make informed decisions. In this article, we provide that update. We surveyed 76 scientists for their opinions on eyewitness memory phenomena. We compared these current expert opinions to expert …

Gatekeeping & Class Certification: The Eleventh Circuit’S Stringent Approach To Admitting Expert Evidence In Support Of Class Certification, Pravin Patel, Mark Pinkert, Patrick Lyons

University of Miami Law Review

Federal Rule of Civil Procedure 23 is silent on whether evidence offered in support of a motion for class certification must be admissible under the Federal Rules of Evidence. The Supreme Court has not addressed this issue, and there is currently no authoritative framework for incorporating all or some of the federal evidentiary rules into the class certification process. Resultantly, circuit courts are split on this question and have coalesced among several different approaches. The Eleventh Circuit follows a rigorous evidentiary standard in which evidence offered in support of class certification generally must be admissible under the Federal Rules of …

Judging Firearms Evidence, Brandon L. Garrett, Eric Tucker, Nicholas Scurich

Faculty Scholarship

Firearms violence results in hundreds of thousands of criminal investigations each year. To try to identify a culprit, firearms examiners seek to link fired shell casings or bullets from crime scene evidence to a particular firearm. The underlying assumption is that firearms impart unique marks on bullets and cartridge cases, and that trained examiners can identify these marks to determine which were fired by the same gun. For over a hundred years, firearms examiners have testified that they can conclusively identify the source of a bullet or cartridge case. In recent years, however, research scientists have called into question the …

"Pics Or It Didn't Happen" And "Show Me The Receipts": A Folk Evidentiary Rule, Timothy Lau

Vanderbilt Law Review

"Pics or It Didn't Happen," "Show Me the Receipts," and related refrains are frequently encountered in online discussion threads today. They are typically invoked to demand corroboration in support of a claim or to declare from the outset that a claim is supported by some sort of proof In many ways, they are the functional counterpart of legal evidentiary objections in online discussions. They embody a folk evidentiary rule, democratically and organically developed by the people.

The topic of "Pics or It Didn't Happen" is much broader than can be covered in a symposium piece. As such, this Article seeks …

Symposium: Reimagining The Rules Of Evidence At 50, Edward K. Cheng

Vanderbilt Law School Faculty Publications

Prior to the eighteenth century, cartographers would often fill uncharted areas of maps with sea monsters, other artwork, or even rank speculation—a phenomenon labeled “horror vacui,” or fear of empty spaces. For example, in Paolo Forlani’s world map of 1565, a yet to-be-discovered southern continent was depicted with anticipated mountain chains and animals. The possible explanations for horror vacui are varied, but one reason may have been a desire “to hide [the mapmakers’] ignorance.” Not until “maps began to be thought of as more purely scientific instruments . . . [did] cartographers . . . restrain their concern about spaces …

Of Bass Notes And Base Rates: Avoiding Mistaken Inferences About Copying, Christopher Buccafusco, Rebecca Tushnet

Faculty Scholarship

To prove copyright infringement, a plaintiff must convince a jury that the defendant copied from the plaintiff’s work rather than independently creating it. To prove copying, especially cases involving music, it’s common for plaintiffs and their experts to argue that the similarities between the parties’ creative works are so great that it is simply implausible that the defendant’s work was created without copying from the plaintiff’s work. Unfortunately, in its present form, the argument is mathematically illiterate: It assumes, without any underlying evidence, that the experts know or could reasonably estimate how likely it is that a song with similarity …

How Florida’S Courts Should Evaluate The Admissibility Of Field Sobriety Testing And Blood Thc Levels Evidence In Marijuana Impaired Driving Prosecutions, Christopher Bomhoff

FIU Law Review

Field sobriety and blood alcohol concentration tests are proven reliable techniques to determine whether a person us under the influence of alcohol. No such technique has been developed to reliably determine whether a person is under the influence of marijuana. However, despite a lack of scientific consensus regarding the reliability of field sobriety and blood toxicology tests to determine marijuana impairment, these methods are routinely used as evidence of guilt in marijuana impaired driving prosecutions. Twenty-four states have legalized the recreational use of marijuana, and Florida appears to be set to join them in the near future. As a result …

Judging Firearms Evidence And The Rule 702 Amendments, Brandon Garrett, Nicholas Scurich, Eric Tucker, Hannah Bloom

Faculty Scholarship

No abstract provided.

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

Faculty Scholarship

No abstract provided.

Having Your Cake And Eating It, Too: Using Special Masters In Daubert Hearings To Promote Scientific Analyses Of Expert Testimony, Luis Balart

Louisiana Law Review

The article discusses issues on the admissibility of scientific evidence in federal court trials in the U.S., and the use by judges of court-appointed experts and advisors to help in making evidentiary decisions requiring technical or scientific knowledge.

Evidence On Fire, Valena Beety, Jennifer Oliva

Articles by Maurer Faculty

Fire science, a field largely developed by lay “arson investigators,” police officers, or similar first responders untrained in chemistry and physics, has been historically dominated by unreliable methodology, demonstrably false conclusions, and concomitant miscarriages of justice. Fire investigators are neither subject to proficiency testing nor required to obtain more than a high school education. Perhaps surprisingly, courts have largely spared many of the now debunked tenets of fire investigation any serious scientific scrutiny in criminal arson cases. This Article contrasts the courts’ ongoing lax admissibility of unreliable fire-science evidence in criminal cases with their strict exclusion of the same flimsy …

Making Rule 23 Ideal: Using A Multifactor Test To Evaluate The Admissibility Of Evidence At Class Certification, Cianan M. Lesley

Michigan Law Review

Circuit courts are split on whether and to what extent the Daubert standard should apply at class certification. Potential plaintiffs believe that application of Daubert would make it nearly impossible to obtain class certification. For potential defendants, the application of the standard is an important way to ensure that the certification process is fair. This Note examines the incentives underlying the push to apply the Daubert standard at class certification and the benefits and drawbacks associated with that proposal. It proposes a solution that balances the concerns of both plaintiffs and defendants by focusing on three factors: the obstacles to …

The "Damned" In A Flashover State: Arson And The Use Of Scientific Methods And Expert Testimony In West Virginia, Christopher W. Maidona

West Virginia Law Review Online

The fire moved quickly through the house as Cameron Todd Willingham screamed for his children from the front porch. Inside the blaze were his three children. Firefighters arrived, uncoiled hoses, and aimed water at the raging fire. However, all three Willingham children died that night from smoke inhalation.

News of the December 23, 1991, tragedy spread throughout Corsicana, Texas. Meanwhile, investigators sought to determine what caused the fire. The investigators “toured the perimeter of the house, taking notes and photographs, like archeologists mapping out a ruin.” In the kitchen, they found smoke and heat damage—signs the fire had not originated …

Controlling The Jury-Teaching Function, Richard D. Friedman

Articles

When evidence with a scientific basis is offered, two fundamental questions arise. First, should it be admitted? Second, if so, how should it be assessed? There are numerous participants who might play a role in deciding these questions—the jury (on the second question only), the parties (through counsel), expert witnesses on each side, the trial court, the forces controlling the judicial system (which include, but are not limited to, the appellate courts), and the scientific establishment. In this Article, I will suggest that together, the last two—the forces controlling the judicial system and the scientific establishment—have a large role to …

Forensics, Chicken Soup, And Meteorites: A Tribute To Michael Risinger, Edward K. Cheng

Vanderbilt Law School Faculty Publications

Michael Risinger's scholarship has had a profound impact on our field. And while his work has run the gamut in evidence law, I think it is clear that Michael's true love has always been expert evidence, and more specifically, forensics. So let me take a moment to revisit "an oldie but a goodie": his 1989 article entitled Exorcism of Ignorance as a Proxy for Rational Knowledge: The Lessons of Handwriting Identification "Expertise," published in the University of Pennsylvania Law Review, and co-authored with Mark Denbeaux and Michael Saks.' For those of you who have not read the article, you should. …

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.

Reliability Of Expert Evidence In International Disputes, Matthew W. Swinehart

Michigan Journal of International Law

Part I of this article traces the historical trends in the use of expert evidence in international disputes, from the scattered reliance on experts in the nineteenth and early twentieth centuries to the ubiquity of experts in modern disputes. With that perspective, Part II examines how decision makers have attempted to ensure reliability of the expert evidence that is flooding the evidentiary records of international disputes, while Part III outlines the many problems that still remain. Finally, Part IV proposes a non-exhaustive and nonbinding checklist of questions for analyzing the reliability of any type of expert evidence.

Discovering Forensic Fraud, Jennifer Oliva, Valena Beety

Articles by Maurer Faculty

This Essay posits that certain structural dynamics, which dominate criminal proceedings, significantly contribute to the admissibility of faulty forensic science in criminal trials. The authors believe that these dynamics are more insidious than questionable individual prosecutorial or judicial behavior in this context. Not only are judges likely to be former prosecutors, prosecutors are “repeat players” in criminal litigation and, as such, routinely support reduced pretrial protections for defendants. Therefore, we argue that the significant discrepancies between the civil and criminal pretrial discovery and disclosure rules warrant additional scrutiny.

In the criminal system, the near absence of any pretrial discovery means …

The Increasing Use Of Challenges To Expert Evidence Under Daubert And Rule 702 In Patent Litigation, Douglas G. Smith

Journal of Intellectual Property Law

No abstract provided.

A Simple Theory Of Complex Valuation, Anthony J. Casey, Julia Simon-Kerr

Michigan Law Review

Complex valuations of assets, companies, government programs, damages, and the like cannot be done without expertise, yet judges routinely pick an arbitrary value that falls somewhere between the extreme numbers suggested by competing experts. This creates costly uncertainty and undermines the legitimacy of the court. Proposals to remedy this well-recognized difficulty have become increasingly convoluted. As a result, no solution has been effectively adopted and the problem persists. This Article suggests that the valuation dilemma stems from a misconception of the inquiry involved. Courts have treated valuation as its own special type of inquiry distinct from traditional fact-finding. We show …

Adaptation And The Courtroom: Judging Climate Science, Kirsten Engel, Jonathan Overpeck

Michigan Journal of Environmental & Administrative Law

Climate science is increasingly showing up in courtroom disputes over the duty to adapt to climate change. While judges play a critical role in evaluating scientific evidence, they are not apt to be familiar with the basic methods of climate science nor with the role played by peer review, publication, and training of climate scientists. This Article is an attempt to educate the bench and the bar on the basics of the discipline of climate science, which we contend is a distinct scientific discipline. We propose a series of principles to guide a judge’s evaluation of the reliability and weight …

A Match Made On Earth: Getting Real About Science And The Law, Susan Haack

Articles

Modern legal systems increasingly depend on scientific testimony; but they also need somehow to ensure, so far as possible, that fact-finders aren't misled by highly speculative, poorly-conducted, or dishonestly-presented science. The Critical Common-sensist understanding of science that the author has developed in Defending Science and elsewhere sheds some light on why these interactions between law and science have proven so problematic. But Ms. Acharya's approach to these difficult issues rests on a flawed conception of the supposed "scientific method, " and an idea of legal "legitimacy" too weak to bear the weight she places on it; and her claim that …

Shaken Baby Syndrome, Abusive Head Trauma, And Actual Innocence: Getting It Right, Keith A. Findley, Patrick D. Barnes, David A. Moran, Waney Squier

Articles

In the past decade, the existence of shaken baby syndrome (SBS) has been called into serious question by biomechanical studies, the medical and legal literature, and the media. As a result of these questions, SBS has been renamed abusive head trauma (AHT). This is, however, primarily a terminological shift: like SBS, AHT refers to the two-part hypothesis that one can reliably diagnose shaking or abuse from three internal findings (subdural hemorrhage, retinal hemorrhage, and encephalopathy) and that one can identify the perpetrator based on the onset of symptoms. Over the past decade, we have learned that this hypothesis fits poorly …

Don’T I Know You?: The Effect Of Prior Acquaintance/Familiarity On Witness Identification, James E. Coleman Jr., Theresa A. Newman, Neil Vidmar, Elizabeth Zoeller

Faculty Scholarship

No abstract provided.

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?

Irreconcilable Differences? The Troubled Marriage Of Science And Law, Susan Haack

Articles

No abstract provided.

Race, Genes And Justice: A Call To Reform The Presentation Of Forensic Dna Evidence In Criminal Trials, Jonathan Kahn

Faculty Scholarship

The article considers how and when, if at all, is it appropriate to use race in presenting forensic DNA evidence in a court of law? This relatively straightforward question has been wholly overlooked by legal scholars. By pursuing it, this article promises to transform fundamentally the presentation forensic DNA evidence. Currently, it is standard practice for prosecutors to use race in presenting the odds that a given defendant's DNA matches DNA found at a crime scene. This article takes an interdisciplinary approach to question the validity of this widespread but largely uninterrogated practice. It examines how race came to enter …

What's Wrong With Litigation-Driven Science? An Essay In Legal Epistemology, Susan Haack

Articles

No abstract provided.

Of Truth, In Science And In Law, Susan Haack

Articles

No abstract provided.