Institute of Environmental Science and Research

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Applying calibration to LRs produced by a DNA interpretation software

journal contribution
posted on 2019-11-13, 03:39 authored by Jo-Anne Bright, M. Jones Dukes, S. N. Pugh, I. W. Evett, John S. Buckleton
Ramos and Gonzalez-Rodriguez introduce the concept of calibration in order to determine whether a system of evidence presentation is a reliable assessor of evidential weight. In this paper, we apply this calibration method to a dataset of mixed forensic DNA profiles generated using the QIAGEN Investigator® 24plex QS Kit and interpreted using the probabilistic genotyping software STRmix™.We describe the methodology for applying calibration to sets of forensic DNA profiles. We observe an approximate correspondence of the posterior probability, as assigned from the LR and the prior odds, with the observed rate of true donors for this dataset.


US National Institute of Justice - Grant No. 2017-DN-BX-K541