"Three shipments of drugs imported by the Arizona Department of Corrections were represented to U.S. customs and Food and Drug Administration officials as being for use on animals despite being intended for use in inmate executions.
According to documents obtained by The Arizona Republic under the federal Freedom of Information Act, two batches of the anesthetic sodium thiopental and one batch of the paralytic-drug pancuronium bromide were brought into the country from Britain last September and October and were described on federal import paperwork as being for "Animal (Food Producing)."
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http://www.azcentral.com/arizonarepublic/news/articles/2011/03/25/20110325arizona-execution-drugs-import.html#ixzz1He84jomK