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Chemist pleads not guilty to lying about evidence as review of cases goes on

By Rande Iaboni, CNN
updated 11:47 AM EST, Fri December 21, 2012
STORY HIGHLIGHTS
  • Annie Dookhan worked as a chemist for the state for nine years
  • She was arrested in September and charged with lying about drug evidence
  • Prosecutors are reviewing hundreds of drug convictions in the state
  • Dookhan pleaded not guility on Thursday.

(CNN) -- A former Massachusetts state chemist arrested for allegedly lying about drug evidence pleaded not guilty Thursday, as prosecutors continued to review more than 1,000 cases in which people went to prison because of the chemist's work.

Annie Dookhan, 35, pleaded not guilty to 15 charges -- eight counts of evidence tampering, five counts of witness intimidation, one count of perjury, and one count of making a false claim of holding a master's degree, according to Maura A. Hennigan, clerk magistrate of Suffolk Superior Criminal Court.

When Dookhan was arrested in September, Massachusetts authorities said they would review the