In an emotional address Raffaele Sollecito, Amanda Knox’s co-defendant and former boyfriend, told judges he had “never harmed anyone”.

Today, Knox and Sollecito make their final case in a bid to prove their innocence for the killing of Meredith Kercher.

Sollecito was clearly nervous and told the courtroom his life felt like a nightmare.

“I have never harmed anyone, never, ever in my life,” he said.

The 27-year-old recalled when he first met Knox, calling her “sunny and sweet”.

He talked about the living hell of spending 20 hours a day for the past 1,400 days in a cell measuring around 2.5m by 3.5m.

Sollecito ended by removing a bracelet bearing the words, "Amanda and Raffaele free", saying he had never taken it off in prison.

Knox and her co-defendant Raffaele Sollecito, jailed for 26 years and 25 years respectively for the murder of British student Kercher, face the court this morning ahead of the jury’s decision as to whether the convictions should stand or be quashed.

"It's going to be a heartfelt statement she's going to make," Knox's father Curt told NBC's TODAY. "I think she just wants to have the judge and jury hear one more time that she had nothing to do with this horrific case and that she is innocent of the charges and hopes for an acquittal.”

"Amanda is going to be making spontaneous statements and it's going to be very tough to hear her have to really struggle for her life," he added. "She's going to be pleading for her life, and that's going to be very difficult to listen to."

Knox who has served four years in jail was convicted of killing her British housemate Meredith Kercher in a brutal crime which appeared to start out as a sexual assault.

Throughout the trial prosecutors have depicted Knox as a manipulative she-devil leading her defence team to claim she has been a victiom of “trial by media” but an independent review of the forensic evidence has cast doubts over the main DNA evidence linking Knox and Sollecito to the crime.

"She is confident, she is jittery, she is waiting and a little bit frightened by the wait," Knox's lawyer Maria Del Grosso told reporters. "She is not scared of the truth. She worries for a decision over her life. But she is positive."

Kercher was murdered in the Perugia apartment she shared with Knox on November 2007.

In a separate trial Rudy Guede, was convicted on 28 October 2008 of the sexual assault and murder of Kercher and sentenced to 30 years in jail. His sentence was later reduced sentence of 16 years.