Inside the DEA: A chemist's quest to identify mystery drugs

In this Aug. 9, 2016, photo, forensic chemist Emily Dye handles evidence, seized in drug raids, which contains fentanyl analogs at the Drug Enforcement Administration (DEA) Special Testing and Research Laboratory in Sterling, Va. A novel class of deadly drugs is exploding across the country, with many manufactured in China for export around the world. The drugs, synthetic opioids, are fueling the deadliest addiction crisis the U.S. has ever seen. (AP Photo/Cliff Owen)WASHINGTON (AP) — No one knew what was in the baggie. It was just a few tablespoons of crystalline powder seized back in April, clumped like snow that had partially melted and frozen again.

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