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article_snippet.sent: Gov. Sonny Perdue subsequently launched an investigation, which concluded in June 2011 .
article_snippet.sent: The trail started in August 2014 .
article_snippet.sent: Source: AP, The New York Times . '
article_snippet.sent: The criminal investigation by the Fulton County district attorney's office lasted nearly two years.
article_snippet.sent: Howard the case was the biggest and most complex his office had ever handled lasting nearly two years and involved hundreds of interviews with school administrators, staff, parents and students.