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Evidence Commons

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Science and Technology Law

DNA evidence

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Full-Text Articles in Evidence

Confronting Science: Expert Evidence And The Confrontation Clause, David H. Kaye, Jennifer L. Mnookin Mar 2016

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

David Kaye

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 …


Dna Typing: Emerging Or Neglected Issues, David H. Kaye, Edward J. Imwinkelried Mar 2016

Dna Typing: Emerging Or Neglected Issues, David H. Kaye, Edward J. Imwinkelried

David Kaye

DNA typing has had a major impact on the criminal justice system. There are hundreds of opinions and thousands of cases dealing with DNA evidence. Yet, at virtually every stage of the process, there are important issues that are just emerging or that have been neglected.At the investigative stage, courts have barely begun to focus on the legal limitations on the power of the police to obtain samples directly from suspects and to use the data from DNA samples in various ways. Issues such as the propriety of "DNA dragnets" (in which large numbers of individuals in a geographic area …


Testing Jury Reforms, Valerie P. Hans, B. Michael Dann, David H. Kaye, Erin J. Farley, Stephanie Albertson Jun 2015

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

Valerie P. Hans

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?