New York State Police TrueAllele® Validation

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Presentation transcript:

New York State Police TrueAllele® Validation New York State DNA Subcommittee Russell Gettig, PhD May, 2011 Cybergenetics © 2007-2011

Property Crime Study Materials • 25 property crime cases • 91 evidence items • nonsuspect reference comparison Match information results • human: 6 CMPs reported • computer: 33 LRs reported

Efficacy and Reproducibility

Sensitivity and Specificity Within-case sensitivity Between-case specificity

Evidence-to-evidence Within-case sensitivity Between-case specificity

Preserving Identification Information

Solving Unsolved Cases

Complex Case • 30 evidence items • 6 known references • genotype: 36 items • compare: 180 pairs

Genotype Report Probabilistic genotype: SWGDAM 3.2.2, ANSI/NIST 18.020

Match Report A joint log(LR) value of 21.92 is 8.32 sextillion

Conclusions TrueAllele interpretation of DNA evidence • information preserving • reproducible • sensitive • specific • solves unsolved cases • simplifies complex cases • easy to use • easy to report