CNN CNN Newsroom November 23, 2013 22:21:00
Story, it is staggering in what the impact what may be. a former mches state chemist is on her way to prison for faking test results. she pleaded guilty to 27 counts yesterday including tampering with evidence, perjury, obstruction of justice and falsely claiming to be holding a master's degree. many of the samples she tampered with came from blood cases brought by police and now thousands of those cases could be in jeopardy. well get more from susan candiotti. >> reporter: annie ducan is going to prison after her testimony put hundreds of others behind bars illegally. beyond pleading guilty, ...