Document Details
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Document Type |
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Article In Journal |
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Document Title |
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The factor of 10 in forensic DNA match probabilities The factor of 10 in forensic DNA match probabilities |
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Document Language |
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English |
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Abstract |
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An update was performed of the classic experiments that led to the view that profile probability
assignments are usually within a factor of 10 of each other. The data used in this study consist of 15
Identifiler loci collected from a wide range of forensic populations. Following Budowle et al. [1], the terms
cognate and non-cognate are used. The cognate database is the database from which the profiles are
simulated. The profile probability assignment was usually larger in the cognate database. In 44%–65% of
the cases, the profile probability for 15 loci in the non-cognate database was within a factor of 10 of the
profile probability in the cognate database. This proportion was between 60% and 80% when the FBI and
NIST data were used as the non-cognate databases. A second experiment compared the match probability
assignment using a generalised database and recommendation 4.2 from NRC II (the 4.2 assignment) with
a proxy for the matching proportion developed using subpopulation allele frequencies and the product
rule. The
findings support that the 4.2 assignment has a large conservative bias. These results are in
agreement with previous research results. |
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ISSN |
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1872-4973 |
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Journal Name |
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Forensic Science International: Genetics |
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Volume |
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28 |
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Issue Number |
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1 |
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Publishing Year |
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1438 AH
2017 AD |
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Article Type |
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Article |
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Added Date |
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Wednesday, May 17, 2017 |
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Researchers
| Simone Gittelson | Gittelson, Simone | Investigator | Doctorate | |
| Tamyra R Moretti | Moretti, Tamyra R | Researcher | Doctorate | |
| Anthony J Onorato | Onorato, Anthony J | Researcher | Doctorate | |
| Bruce Budowle | Budowle, Bruce | Researcher | Doctorate | |
| Bruce S Weir | Weir, Bruce S | Researcher | Doctorate | |
| John Buckleton | Buckleton, John | Researcher | Doctorate | |
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