JSM 2004 - Toronto

Abstract #302275

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Activity Number: 250
Type: Other
Date/Time: Tuesday, August 10, 2004 : 2:00 PM to 3:50 PM
Sponsor: ASA
Abstract - #302275
Title: Post-NAS Realities of Comparative Bullet Lead Analysis
Author(s): William Tobin*+
Companies: Consultant
Address: 2708 Little Gunstock Road, Bumpass, VA, 23024-8882,
Keywords:
Abstract:

Because the recent report by the National Research Council of the National Academies of Science (NAS) on the forensic practice of comparing bullet lead compositions is circumspect, painstakingly diplomatic, and subtle, the FBI Laboratory Group leader for the practice claims that the study vindicated the FBI position on the practice and continues to testify in court that FBI analysts can link a bullet composition to a specific "molten source." This talk will update attendees on the post-NAS state of affairs regarding the forensic practice of comparative bullet lead analysis (CBLA), the realities of bullet distribution, and why statistical estimation of a "false-positive probability" based on bullet compositions in the FBI bullet lead database may not be of probative significance.

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Revised March 2004