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Science & Tech Spotlight: Probabilistic Genotyping Software

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Report Type Reports and Testimonies
Report Date Sept. 16, 2019
Release Date Sept. 16, 2019
Report No. GAO-19-707SP
Summary:

Faced with minimal or complicated DNA evidence—a sample with DNA from more than 1 person, for example—investigators can use a forensic tool called probabilistic genotyping software. It estimates how likely it is that the genetic material in the sample is linked to a person of interest.

Users of this software include crime labs, police, and the FBI. However, more work is needed to establish its scientific validity. For example, there are no standards for using and interpreting results, and different software packages may produce different results. Inappropriate use may have implications for constitutional due process protections.

Boxes of evidence on a metal shelf

Boxes of evidence on a metal shelf

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