Knox, of West Seattle, is on trial with her boyfriend, Raffaele Sollecito, for the group murder of Kercher in Perugia, Italy, where Knox attended college on a University of Washington foreign exchange program, and where, on the night of Nov. 1, 2007, the murder took place.

A third suspect, Rudy Hermann Guede, has already been convicted of the murder and is serving time.

The prosecution claims the three converged in a deadly sex ritual and killed Kercher. Reports say that on Nov. 5 Knox performed cartwheels, consistent with what they claim as Knox's "strange behavior" she exhibited on other occasions shortly after the murder.