Science & Justice
Volume 48, Issue 4 , Pages 168-177, December 2008

A MCMC method for resolving two person mixtures

Department of Statistics, University of Auckland, Private Bag 92019, Auckland, New Zealand

Received 3 April 2007; received in revised form 10 August 2007; accepted 23 September 2007. published online 12 November 2007.

Abstract 

In this paper a Monte Carlo Markov Chain (MCMC) method for resolving DNA mixtures containing at most four peaks per locus into a major and a minor contributor is presented. Unlike previous methods, this method can provide posterior probability assessments of the most probable genotype and a likely range for the mixing proportion. The proposed method is applied to two DNA mixtures where the true genotypes of the contributors are known. The method provides posterior probabilities of the genotypes of the contributes which concord strongly with the known facts.

Keywords: DNA, Bayesian, Mixture, MCMC, Pendulum

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PII: S1355-0306(07)00106-2

doi:10.1016/j.scijus.2007.09.014

Science & Justice
Volume 48, Issue 4 , Pages 168-177, December 2008

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