A prosecutor urged a court on Monday to take steps to make sure that American Amanda Knox and her former Italian boyfriend would serve their sentences, if they are convicted of murdering British student Meredith Kercher.

Prosecutor Alessandro Crini preceded his request by noting that Knox has remained in the United States for this trial, while co-defendant Raffaele Sollecito has traveled abroad during it.

The defense and prosecution were both making their final rebuttals on Monday before the court begins deliberations on Jan. 30. A verdict is expected later that day.

Crini has requested guilty verdicts and jail sentences of 26 years for both defendants, and that the court increase to four years Knox's three-year sentence for a slander conviction, which has been upheld.

In the case of Sollecito, who told reporters Monday that he intends to remain in Italy for the verdict, the precautionary measures could include immediate arrest, house arrest or the confiscation of his passport.

The court's reach in Knox's case is limited by her presence in the United States, where she returned a free woman after the 2009 guilty verdicts against her and Sollecito were thrown out by a Perugia appeals court in 2011. Italy's highest court ordered a second appellate trial after blasting the acquittal.