The forensic unit of the University of California, Davis, Veterinary Genetics Laboratory is housed in a small cluster of run-down, double-wide trailers surrounded by silos and fields. The day I visited, director Elizabeth Wictum and her team had just finished analyzing dog hairs found on the clothes of two Atlanta murder victims. They compared the specimens to hairs collected decades ago from the dog of the man convicted of the murders in 1982, reasoning if the hairs didn't match, he may be innocent.
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