Amanda Knox Prosecutor Concludes His Probe

June 19, 2008— -- The Italian prosecutor investigating the alleged role of American student Amanda Knox in the murder of her roommate insisted today that the victim was sexually assaulted and then murdered, despite a conclusion by forensic experts appointed by the court that sexual assault could not be proven.

A final report on the investigation by prosecutor Giuliani Mignini indicates that Knox and two other suspects are likely to be charged with voluntary homicide, sexual assault and simulation of a crime.

Meredith Kercher, a 22-year-old British student, was found strangled and stabbed last November in the Perugia house she shared with Knox. Both women were studying in the Italian city.

Within days of the killing, Knox, 20, of Seattle, was arrested along with her 24-year-old boyfriend, Raffaele Sollecito. A third person, Rudy Guede, 21, fled to Germany but was later returned to Italy.

The three have been in prison since their arrests, although they have not been charged with Kercher's murder.

The filing today of Mignini's report, which was obtained by ABC News, means his investigation into Kercher's death is complete.

Mignini claims that Kercher was raped, then strangled and stabbed in the neck. He accuses Knox, Sollecito and Guede of also stealing 300 euros from Kercher.

In addition, Mignini claims that Knox and Sollecito faked an attempted burglary of the house Knox and Kercher shared to make the Kercher murder appear to be the result of a burglary.

In response to today's filing, Knox's parents, Edda Mellas and Curt Knox, told ABC News in a statement, "We know our daughter is innocent and we will continue to support her in every way possible. We look forward to her eventual release and to her being found innocent of the charges against her."