Intro Slides

Intro Slides - Report Conclusions Item # 2S1 Suspect1...

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Item # D3S1358 D16S539 AMEL THO1 TPOX CSF1PO D7S820 2S1 Suspect1 15, 17 12 X,Y 7 11 11, 12 10, 11 1C-B Vaginal swab Sperm- Rich 15, 17 12 X,Y 7 11 11, 12 10, 11 4S1 Suspect2 16,17 12 X,Y 6, 9.3 11, 12 10, 13 8, 11 Report Conclusions 1. The results are consistent with Suspect 1 (#2S1) being the source of the DNA profile from item #1C-B. 2. Suspect 2 (#4S1) is eliminated as the source of the DNA profile from item #1C-B. STR Allele Frequencies 0 5 10 15 20 25 30 35 40 45 6 7 8 9 9.3 10 Caucasians (N=427) Blacks (N=414) Hispanics (N=414) Locus: TH01 * Proc. Int. Sym. Hum. ID (Promega) 1997, p. 34. Number of repeats Frequency (%) The results are consistent with J. Smith (item #1) being the source of the DNA profile from item #2 (bloodstain from knife). The expected frequency of individuals who could be the source of the DNA profile from item #2 is less than 1 in 7 billion in the African American, Caucasian, and Hispanic populations. Identifiler Statistics Challenges to the Use of DNA 1. Forensic samples = dirty/minimal quantity. 2. Mixed/contaminated/degraded. Routine and challenging features of forensic casework. DNA MIXTURES •Common in Forensic DNA testing. Sexual Assault samples-intimate swabs, clothing. •Mixtures of victim & suspect(s).
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Intro Slides - Report Conclusions Item # 2S1 Suspect1...

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