The Florida-based company DNAPrint Genomics developed a technology called DNA Witness for use by law enforcement officers to determine “genetic heritage” from DNA samples left at a crime scene.2 DNA is typically used by the police to match a crime scene specimen to the genetic profile of a known suspect. But instead of confirming the identity of a perpetrator the way a fingerprint would, the new DNA phenotyping predicts the race of an unknown suspect. Using the same techniques as for ancestry testing, DNA Witness reports the percentage of genetic makeup among four population groups—sub-Saharan
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