(Wall Street Journal) — The Drug Enforcement Administration has seized a key execution drug from the Georgia prison system because of concerns about how the state imported the drug from overseas. Like other states, Georgia last year was forced to import thiopental sodium from England due to a U.S. shortage of the drug, which is used to carry out lethal injections. “Questions came to light with how the substance was imported” by Georgia, said DEA agent Chuvalo Truesdell, declining to elaborate. He said the DEA will retain control of the drug while it conducts an investigation, which could last up to six months. There are no scheduled executions in the state. Peggy Chapman, a spokeswoman for the Georgia Department of Corrections, said the department notified the DEA after a February letter was sent to Attorney General Eric Holder alleging that Georgia had violated a federal law in acquiring thiopental by failing to register as an importer of the controlled substance.