03969nam 2200673Ia 450 991096199870332120251117115558.09786610176748978030916643003091664389781280176746128017674197803095275690309527562(CKB)111090425020450(OCoLC)70738880(CaPaEBR)ebrary10055617(SSID)ssj0000156942(PQKBManifestationID)12003272(PQKBTitleCode)TC0000156942(PQKBWorkID)10130251(PQKB)10482908(MiAaPQ)EBC3376404(Au-PeEL)EBL3376404(CaPaEBR)ebr10055617(OCoLC)923263568(Perlego)4734731(BIP)10823176(EXLCZ)9911109042502045020040429d2004 uy 0engurcn|||||||||txtccrForensic analysis weighing bullet lead evidence /Committee on Scientific Assessment of Bullet Lead Elemental Composition Comparison, Board on Chemical Sciences and Technology, Division of Earth and Life Studies, National Research Council of the National Academies1st ed.Washington, D.C. National Academies Press20041 online resource (226 p.) "Support for this study was provided by the Federal Bureau of Investigation under Contract No. S2N0216700"--T.p. verso.9780309090797 0309090792 Includes bibliographical references.FrontMatter -- Acknowledgment of Reviewers -- Preface -- Contents -- Executive Summary -- 1 Introduction -- 2 Compositional Analysis -- 3 Statistical Analysis of Bullet Lead Data -- 4 Interpretation -- 5 Major Findings and Recommendations -- APPENDIXES -- A Statement of Task -- B Committee Membership -- C Committee Meeting Agendas -- D Glossary -- E Basic Principles of Statistics -- F Simulating False Match Probabilities Based on Normal Theory -- G Data Analysis of Table 1, Randich et al. -- H Principal Components Analysis: How Many Elements Should Be Measured? -- I Birthday Problem Analogy -- J Understanding the Significance of the Results of Compositional Analysis of Bullet Lead -- K Statistical Analysis of Bullet Lead Data.Since the 1960s, testimony by representatives of the Federal Bureau of Investigation in thousands of criminal cases has relied on evidence from Compositional Analysis of Bullet Lead (CABL), a forensic technique that compares the elemental composition of bullets found at a crime scene to the elemental composition of bullets found in a suspect (TM)s possession. Different from ballistics techniques that compare striations on the barrel of a gun to those on a recovered bullet, CABL is used when no gun is recovered or when bullets are too small or mangled to observe striations. Forensic Analysis: Weighing Bullet Lead Evidence assesses the scientific validity of CABL, finding that the FBI should use a different statistical analysis for the technique and that, given variations in bullet manufacturing processes, expert witnesses should make clear the very limited conclusions that CABL results can support. The report also recommends that the FBI take additional measures to ensure the validity of CABL results, which include improving documentation, publishing details, and improving on training and oversight.BulletsIdentificationLeadAnalysisChemistry, ForensicBulletsIdentification.LeadAnalysis.Chemistry, Forensic.363.2562MiAaPQMiAaPQMiAaPQBOOK9910961998703321Forensic analysis2615723UNINA