Former state lab chemist Annie Dookhan, center, speaks with her lawyer Nick Gordon, left, at Middlesex Superior Court as she waits for her for arraignment to begin with her father, Rasheed Khan, on Wednesday, Jan. 9, 2013, in Woburn, Mass. Dookhan pleaded not guilty to three counts of obstruction of justice.  She is charged in connection with altering drug evidence during the testing process and obstructing justice. Prosecutors allege Dookhan fabricated test results and tampered with drug evidence while testing substances in criminal cases.  (AP Photo/The Boston Globe, Suzanne Kreiter, Pool)