The parents of Amanda Knox, an American student convicted of murder in Italy, say they won't be deterred from seeking to prove their daughter's innocence after they were indicted for libel.

Curt Knox and Edda Mellas were indicted this week in Perugia for alleging that Italian police abused their daughter.

The couple said in a statement emailed to The Associated Press that the charge was expected and that their "focus is unchanged" and "remains wholeheartedly with our daughter, her appeal, overturning her wrongful conviction, and bringing her home."

Knox was convicted in 2009 of murdering Meredith Kercher, her roommate in Perugia, and sentenced to 26 years. She denies wrongdoing and her appeals trial is under way.