FILE - In this Jan. 9, 2013 file photo, 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. Dookhan pleaded not guilty to additional obstruction of justice charges in Brockton, Mass., Wednesday, Jan. 30, 2013, and also faced arraignment later Wednesday in Fall River. (AP Photo/Steven Senne, Pool, File)

Associated Press
FILE - In this Jan. 9, 2013 file photo, 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.  Dookhan pleaded not guilty to additional obstruction of justice charges in Brockton, Mass., Wednesday, Jan. 30, 2013, and also faced arraignment later Wednesday in Fall River. (AP Photo/Steven Senne, Pool, File)
FILE - In this Jan. 9, 2013 file photo, 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. Dookhan pleaded not guilty to additional obstruction of justice charges in Brockton, Mass., Wednesday, Jan. 30, 2013, and also faced arraignment later Wednesday in Fall River. (AP Photo/Steven Senne, Pool, File)