Italy’s top criminal court on Monday said the murder case of Amanda Knox had “stunning flaws” — and that prosecutors brought it to trial with an “absolute lack of biological traces” tying Knox and her co-defendant, former boyfriend Raffaele Sollecito, to the murder of Knox’s British roommate.

The five-judge panel, explaining why it threw out the pair’s convictions in the 2007 murder of Meredith Kercher, said they did so in part because there was no proof Knox and Sollecito were in the bedroom where Kercher was fatally stabbed. Knox and Kercher shared an apartment as students in Perugia.

The March ruling cleared Knox and Sollecito once and for all in Kercher’s murder.

Carlo Dalla Vedova, one of Knox’s lawyers, said Knox was “very satisfied and happy to read this decision. At the same time, it’s a very sad story. It’s a sad story because Meredith Kercher is no longer with us, and this is a tragedy nobody can forget.”

In a statement issued Monday, Knox said: “I am deeply grateful that the Italian Supreme Court has filed its opinion and forcefully declared my innocence. This has been a long struggle for me, my family, my friends, and my supporters. While I am glad it is now over, I will remain forever grateful to the many individuals who gave their time and talents to help me.”

Knox said she would “now begin the rest of my life with one of my goals being to help others who have been wrongfully accused.”

The case began on Nov. 2, 2007, when the body of Kercher, a 21-year-old student from Surrey, England, was found in the bedroom of the apartment she and Knox shared. Kercher’s throat had been cut and she had been sexually assaulted.

The case attracted worldwide attention, with Knox, a native of Washington state, portrayed both as a harmless innocent and a “sex-crazed killer,” The Guardianreported.