Amanda Knox breaks her silence saying "I'm not a murderer"

For the first time, Amanda Knox, the American college student convicted of murdering her roommate is telling her side of the story.

Knox and her former boyfriend spent four years in an Italian prison before their convictions where thrown out in 2011.

But in a dramatic ruling last year Italy's high court threw out that decision and ordered a new trial.

Alina Cho is OutFront with Knox's attempt to set the record straight.