Former state chemist Annie Dookhan, center, sits with her family Friday, Nov. 22, 2013, in Suffolk Superior Court in Boston, before a hearing where she entered a guilty plea on charges of obstruction of justice, perjury and tampering with evidence. Dookhan, who admitted faking test results in criminal cases, was sentenced to three to five years in prison, followed by two years' probation. (AP Photo/The Boston Globe, David L Ryan, Pool)

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