Forensic science and the myth of adversarial testing

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Abstract

This article explains why the adversarial trial has not been an effective mechanism for regulating the admission and use of many forms of forensic science evidence. Drawing upon mainstream scientific perspectives, and using an historical study of reported decisions involving latent fingerprint evidence, it documents how lawyers and judges never required forensic scientists to formally evaluate their procedures or express opinions in ways that are scientifically defensible. For more than a century, every challenge to latent fingerprint evidence focused on legal and procedural issues, or the significance of fingerprints for the case. Questions about validity and scientific reliability (eg, Can you do it? How accurate are you?) were not asked until 2015. The study shows that legal approaches and practices were, and are, insensitive to mainstream scientific perspectives on latent fingerprint evidence. It demonstrates that our practices around the admission and presentation of fingerprint evidence (and implicitly many other types of forensic science and medicine) are fundamentally misconceived, that our lawyers and judges genuinely struggle with technical evidence and that our legal institutions have developed rules and commitments that prevent them from receiving the benefits of mainstream scientific research and advice.
Original languageEnglish
Pages (from-to)146-179
JournalCurrent Issues in Criminal Justice
Volume32
Issue number2
Early online date1 Dec 2019
DOIs
Publication statusPublished - 2 Apr 2020

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