Evidence Commons^™

Something Doesn’T Add Up: Solving Dna Forensic Science Statistical Fallacies In Trial Testimony, Kendall Brooke Kilberger

Vanderbilt Journal of Entertainment & Technology Law

While the limitations of traditional forensic sciences are generally recognized, the presentation of DNA forensic science statistical testimony has widely evaded criticism. This lack of oversight has allowed four DNA forensic science statistical fallacies to plague the legal system: providing statistics without empirical support, the individualization fallacy, the prosecutor’s fallacy, and the defense attorney’s fallacy. These fallacies pose a significant risk to the preservation of justice, as erroneous DNA forensic science statistical testimony plays a critical role in wrongfully convicting innocent defendants.

This Note suggests administering standard jury instructions every time DNA forensic science statistical testimony is presented during trial. …

“Statistics Are Human Beings With The Tears Wiped Away”: Utilizing Data To Develop Strategies To Reduce The Number Of Native Americans Who Go Missing, Lori Mcpherson, Sarah Blazucki

Seattle University Law Review

On New Year’s Eve night, 2019, sixteen-year-old Selena Shelley Faye Not Afraid attended a party in Billings, Montana, about fifty miles west of her home in Hardin, Montana, near the Crow Reservation. A junior at the local high school, she was active in her community. The party carried over until the next day, and she caught a ride back toward home with friends in a van the following afternoon. When the van stopped at an interstate rest stop, Selena got out but never made it back to the van. The friends reported her missing to the police and indicated they …

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 …

Problems With Using Statistics To Justify Institutional Policies, Justin Shin

Senior Projects Spring 2017

It is becoming increasingly common for institutions to use statistics to inform policy decisions. We should be prepared to ask ourselves what regulatory principles should be imposed on institutions that seek to justify certain policies through deference to a statistical analysis. This paper will examine the difficulties that come with using statistics to justify actions, and argue that certain standards of transparency and verifiability should be expected from any institution that seeks to involve a statistical analysis in the formation of policies. I will first use Market Share Liability, an established use of statistics, to draw out what responsibilities an …

Experts, Statistics, Science & Bad Science, Curtis E.A. Karnow

Curtis E.A. Karnow

Articles, books, and other online resources relating to expert testimony with a specific focus on problems with peer review, bad science, and statistics

The Discoverability Of E-Mails: The Smoking Gun Of The Modern Era, Michael J. Martin

University of Massachusetts Law Review

The discoverability of e-mails is an area of law that every modern day lawyer must be familiar with in order to avoid the risk of being sanctioned. Over the past years, courts have awarded sanctions to moving parties at a steadily increasing pace. These sanctions have included adverse jury instructions, default judgements, attorney's fees, large monetary fines, and in one instance, a jail sentence. Courts have sent the message that improper conduct will not be tolerated in this developing area of law by not hesitating to order sanctions. Thus, it is essential that modern day lawyers become acquainted with the …

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 …

Dna As Evidence: Viewing Science Through The Prism Of The Law, Peter Donnelly, Richard D. Friedman

Articles

In this article, we analyze a problem related to DNA evidence that is likely to be of great and increasing significance in the near future. This is the problem of whether, and how, to present evidence that the suspect has been identified through a DNA database search. In our view, the two well-known reports on DNA evidence issued by the National Research Council (NRC) have been badly mistaken in their analysis of this problem. The mistakes are significant because the reports have carried great authority with American courts; moreover, the DNA Advisory Board of the FBI has endorsed the second …

Dna Database Searches And The Legal Consumption Of Scientific Evidence, Peter Donnelly, Richard D. Friedman

Articles

DNA evidence has transformed the proof of identity in criminal litigation, but it has also introduced daunting problems of statistical analysis into the process. In this Article, we analyze a problem related to DNA evidence that is likely to be of great and increasing significance in the near future. This is the problem of whether, and how, to present evidence that the suspect has been identified through a DNA database search. In our view, the two well-known reports on DNA evidence issued by the National Research Council ("NRC"), each of which has carried great authority with the American courts on …