Annie Dookhan, center, sits between two unidentified men in Suffolk Superior Court 

Annie Dookhan, center, sits between two unidentified men in Suffolk Superior Court moments before her arraignment in Boston, Thursday, Dec. 20, 2012. Dookhan, the former chemist at the center of a U.S. drug testing scandal, pleaded not guilty to charges including perjury and tampering with evidence. (AP Photo/Steven Senne, Pool)
Associated Press
Annie Dookhan, center, sits between two unidentified men in Suffolk Superior Court moments before her arraignment in Boston, Thursday, Dec. 20, 2012. Dookhan, the former chemist at the center of a U.S. drug testing scandal, pleaded not guilty to charges including perjury and tampering with evidence. (AP Photo/Steven Senne, Pool)
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