ABC's Diane Sawyer to interview Amanda Knox

NEW YORK, Feb. 11 (UPI) -- Amanda Knox, who was accused of killing her roommate in Italy four years ago, is to give her first television interview to Diane Sawyer, ABC said Monday.

The program will air as an ABC News prime-time special April 30. It will also be featured across all ABC News broadcasts and platforms, including "World News with Diane Sawyer," "Good Morning America," and "Nightline," as well as ABCNews.com, Yahoo!, ABC News Radio, and ABC's local affiliates.

Knox was a college junior studying in Italy before she was convicted in December 2009 on the charge of murdering her British roommate. She spent four years in prison, then was released and cleared of wrongdoing in October 2011.

"Knox's firsthand account of her voyage from American student studying abroad to a woman facing decades in a foreign prison will include details she has never shared," ABC News said in a news release Monday.

Knox's book, "Waiting to Be Heard," is to be published by HarperCollins on April 30.