The evidentiary values of “cold-hits” in a DNA database search on two-person mixture

Yuk Ka Chung, Wing-Kam Fung

Research output: Contribution to journalArticlepeer-review

Abstract

We provide a unified overview on the evaluation of the evidentiary values of cold-hit DNA matches between profiles in a DNA database and a mixed crime sample. Also discussed are methods of handling missing data in evaluating the DNA evidence. Through the analysis of a constructed murder case using Swedish data, we illustrate the applicability of the methods on various situations including the presence of multiple matches and consideration of allele drop-out. We also demonstrate the calculation of the probability of erroneous attribution as a measure of the effectiveness of the database search on DNA mixtures.
Original languageEnglish
Pages (from-to)10-15
Number of pages6
JournalScience and Justice
Volume51
Issue number1
Early online date16 Aug 2010
DOIs
Publication statusPublished - Mar 2011

Keywords

  • database search
  • DNA
  • likelihood ratio
  • mixture

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