what really happened to her at south hadley high? the local district attorney was one of those asking that question. and she was determined to find the answers. >> coming up -- >> our investigation revealed that it was, in fact, a campaign. >> reporter: a campaign of what? >> of tormenting, of making her life miserable. >> it was about to make headlines around the world. what happened to >>> was phoebe prince really bullied to death? it was the question on everyone's mind in south hadley in early 2010. but there was one woman who had the legal power to probe for answers. >> this wasn't a case of sticks and stones. >> reporter: elizabeth schibel was the district attorney who investigated phoebe's suicide. after looking through phone records and the internet, she came to the conclusion that phoebe wasn't just bullied but pounded by classmates after she first started at hadley high. >> our investigation revealed it was, in fact, a campaign. >> reporter: a campaign of what? a campaign of tormenting? >> of tormenting, of making her life m