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Familial database search on two-person mixture

Author

Listed:
  • Chung, Yuk-Ka
  • Fung, Wing K.
  • Hu, Yue-Qing

Abstract

This work presents how the familial database search can be applied to forensic investigations in which the DNA evidence is a mixture. The forensic identification is based on a ranked list of the likelihood ratios for each candidate in the DNA database of being the relative of the contributor of the forensic sample. A simulation study using Hong Kong Chinese data demonstrated the comparable effectiveness of our approach that in 90% of the cases, the sibling of the contributor can be found in the top 50 profiles, and the parent/child can be found in the top 10 profiles. We also discuss the prediction on the performance of the search that can guide the decision of the police force to initiate the investigation.

Suggested Citation

  • Chung, Yuk-Ka & Fung, Wing K. & Hu, Yue-Qing, 2010. "Familial database search on two-person mixture," Computational Statistics & Data Analysis, Elsevier, vol. 54(8), pages 2046-2051, August.
    • Handle: RePEc:eee:csdana:v:54:y:2010:i:8:p:2046-2051
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    References listed on IDEAS

    as
    1. Wing K. Fung & Yue‐Qing Hu, 2000. "Interpreting forensic DNA mixtures: allowing for uncertainty in population substructure and dependence," Journal of the Royal Statistical Society Series A, Royal Statistical Society, vol. 163(2), pages 241-254.
    2. Ronald Meester & Marjan Sjerps, 2003. "The Evidential Value in the DNA Database Search Controversy and the Two-Stain Problem," Biometrics, The International Biometric Society, vol. 59(3), pages 727-732, September.
    3. David J. Balding & Peter Donnelly, 1995. "Inference in Forensic Identification," Journal of the Royal Statistical Society Series A, Royal Statistical Society, vol. 158(1), pages 21-40, January.
    4. David Cavallini & Fabio Corradi, 2006. "Forensic identification of relatives of individuals included in a database of DNA profiles," Biometrika, Biometrika Trust, vol. 93(3), pages 525-536, September.
    5. Anders Stockmarr, 1999. "Likelihood Ratios for Evaluating DNA Evidence When the Suspect is Found Through a Database Search," Biometrics, The International Biometric Society, vol. 55(3), pages 671-677, September.
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