Annie Dookhan, a former Massachusetts chemist accused of faking test results at 

Annie Dookhan, a former Massachusetts chemist accused of faking test results at a state drug lab, pleads not guilty during her arraignment at Norfolk Superior Court, in Dedham, Mass., Wednesday, Jan. 9, 2013. Prosecutors allege Dookhan fabricated test results and tampered with drug evidence while testing substances in criminal cases.  (AP Photo/Steven Senne, Pool)
Associated Press
Annie Dookhan, a former Massachusetts chemist accused of faking test results at a state drug lab, pleads not guilty during her arraignment at Norfolk Superior Court, in Dedham, Mass., Wednesday, Jan. 9, 2013. Prosecutors allege Dookhan fabricated test results and tampered with drug evidence while testing substances in criminal cases. (AP Photo/Steven Senne, Pool)
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