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The Champion

May 2018 , Page 40 

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The Dawning of a New Era in DNA Profiling

By Simon Ford and Dan Krane

Probabilistic genotyping (PG) is a new computer technology for interpreting complicated DNA profiles that is taking crime laboratories by storm. Labs across the country are either in the process of purchasing and validating PG or planning to purchase and validate it in the near future.

Attorneys need to be prepared to litigate cases involving PG because it is already being used in court — even though guidelines on how it is to be used have not yet been written.1 Prominent scientists have advised that it has not yet been foundationally validated for the DNA test results that labs will want to use it for most often.2 Many have expressed concerns that the inner workings of the software programs are known only to the programmers that have developed them.

Even though PG is still evolving, one thing is certain: PG represents a paradigm shift in the way in which DNA profiles are interpreted and reported.

This article will explain why PG constitutes a new era in DNA profiling and how attorneys ca

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