Amanda Knox opened up to Diane Sawyer and told her that she wants the truth to come out about her murder conviction.

In an interview that is set to air Tuesday night at 10/9 p.m. Central on ABC, the 25-year old shared her story. It is one that has been told by others ever since she was arrested for the murder of her roommate Meredith Kercher in 2007. The two were exchange students living together in in Peruga, Italy.

On Nov. 1, 2007, 21-year-old Kercher was, raped and brutally murdered upon stabbing. Rudy Guede, who admitted to spending time with Kercher that evening, was convicted of sexual assault and murder in 2008. Knox and her then-boyfriend, Raffaele Sollecito, were also found guilty of the crime in 2009. She was sentenced to 26 years in prison. However, their convictions were overturned in 2011 and Knox returned to the United States after spending four years in prison.

Her memoir Waiting to Be Heard is Knox's version of what happened. She told Sawyer about how she felt while on trial for the crime that made international news.

"I was in the courtroom when they were calling me a devil," Knox said.

The former college student said she was marginalized by what was being said about her. She said her tell-all was a way of changing people's perceptions of her.

"I mean, it's one thing to be called certain things in the media, and then it's another thing to be sitting in a courtroom fighting for your life when people are calling you a devil," she said. "For all intensive purposes I was a murder ... whether I was or not. And I had to live with the idea that that would be my life."

Knox spoke of the relief she felt when her conviction was overturned. However, the moment was fleeting when it was announced that she would be on trial again for the murder of Kercher.

"I felt like after crawling through a field of barbed wire and finally reaching what I thought was the end, it just turned out that it was the horizon," Knox said. "And I had another field of barbed wire that I had ahead of me to crawl through."

Knox is hopeful that people will see her in a different light and said her book will help them understand how she got to this point in her life.

"I want the truth to come out. I'd like to be reconsidered as a person," she said. "What happened to me was surreal, but it could have happened to anyone."