By the time Mignini completed his lurid description of the attack, Knox was crying and her attorney Luciano Ghirga held her hand. During a brief break in the summation, Knox again started crying and was hugged at length by one of her lawyers.
Outside of court later, Knox attorney Carlo Dalla Vedova said it was a lot for his client to have to listen to. "Obviously it is not nice to hear yourself accused of such a serious murder, of which Amanda has always said she is innocent," he said.
"She cried," said Dalla Vedova, "but she is a 20-year-old girl. She is in jail waiting to be judged. All this has taken its toll on her, and today she let some emotion show."
Knox had apparently anticipated the summations would be a tough day in court. She appeared tense when she arrived at court and occassionally took deep breaths. This was in contrast to the often smiling and composed demeanor through her many court hearings over the course of the eight month long trial.
Back home in Seattle, Knox's parents were hoping for the best and braced for the worst.
"We have to have faith even though things really haven't gone right so far," Knox's mother Edda Mellas told ABC News in an exclusive interview. "We have to have faith they'll get it right this time."
Dad Curt Knox said he was "looking forward to a positive result," but conceded his daughter was "anxious."
She is now in a situation, he said, "in which none of us have control over her fate, including herself. You're always worried that the judge and jury would come up with something different than you heard in the court of law."
"You have to be prepared for all scenarios," he said. "We're very very hopeful and we believe everything presented [proves she's innocent]."
Mignini began his scheduled eight-hour summation by acknowledging that the trial has attracted widespread media attention in Italy, the U.S. and Britain. And he bristled at the criticism of the police and prosecution, saying some "carried out a parallel trial - but the trial is taking place in this courtroom."
"I did not expect this inability to understand…this constant acrimonious villification," the prosecutor complained.
He then waded into the case and focused on what he says was a staged break-in the Perugia cottage that Knox and Kercher shared, calling it "the nail on which the whole case hangs."
Knox and Sollecito's lawyers have claimed that the break-in suggests that Guede broke into the house and killed Kercher. Guede has already been convicted of taking part in the murder and been sentenced to 30 years in prison.
But Mignini said the evidence proves the burglary was faked by Knox and Sollecito to cover up their part in the murder. Proving that the break-in was staged, he said, proves that Knox and Sollecito participated in the murder and staged the break-in.
The window chosen for the break-in was the most improbable one in the house, Mignini said. It was a very high and in full view of the road. The nine pound rock that was found in the room was large and difficult to throw accurately for a distance of three yards.
Shattered glass was found on clothes lying on the floor in the room, indicating the window was broken after the room was disturbed in an attempt to make it look like it had been burglarized.
The window led to the room of Filomena Romanelli, but nothing was stolen from the room although it contained jewelry, a computer and expensive bags, he said.