New CCTV footage obtained by Italian television has cast doubt on Amanda Knox's alibi on the night her roommate, Meredith Kercher, was murdered in 2007.
The surveillance video, broadcast by investigative programme Quarto Grado this week, shows a woman resembling Amanda Knox walking through a car park away from the home she shared with Kercher in Perugia at just before 9pm on November 1, 2007.
Knox has always claimed that she spent that evening with her boyfriend, Raffaele Sollecito, who was also accused of Meredith's murder.
But programme makers have questioned that claim, with the grainy footage showing a woman walking on the night of the murder (left) that is compared to an image of Knox (right), now aged 26:
CCTV footage from the night of Meredith Kercher's murder shows a woman resembling Amanda Knox walking through a car park near the flat the two women shared in Perguia
It's not clear why the footage is being released now or how it was obtained.
Both Kercher and Knox were 21 years old and studying Italian in the picturesque town of Perugia, when Kercher was found stabbed to death in the flat they shared on 2 November 2007.
Last week, Italian judges reinstated a guilty verdict against Knox and her former boyfriend Sollecito, after the pair were acquitted of Kercher's murder on appeal in 2011.
Amanda Knox holds a sign reading "we are innocent" in a post on Twitter this February
Explaining its reasoning, the appeals court in Florence said the victim's wounds indicated multiple aggressors.
Another man, Rudy Guede, is already serving a 16-year prison sentence after being convicted of Kercher's murder at an earlier trial.
The judges said they believe both Knox and Sollecito wielded knives, as Guede held Kercher down and committed a sexual assault. They claimed it was Knox who "delivered the only mortal blow" that night, striking Kercher with a kitchen knife.
The prosecution had originally argued that Kercher was killed in a sex game that spiralled out of control. But the appeals court agreed with a later theory that she was killed after a violent argument.
Meredith Kercher was found dead in the flat she shared with Amanda Knox in November 2007
Knox and Sollecito were originally convicted of the murder in 2007. Knox was sentenced to 28 years and six months and Sollecito received 25 years. Both served four years in prison before being released on appeal, with Knox travelling back to live in the States.
The appeal ruling was overturned in January this year and the trial will now go back to Italy's highest court, the Court of Cassation, which could uphold or overturn the verdict. If the verdict is upheld, the court is expected to undergo a lengthy process to extradite Knox back to Italy to serve prison time.
The flat where Meredith Kercher was found dead in Perugia, Italy
Both Knox and Sollecito have always maintained their innocence and are expected to appeal against the court's latest decision. In a statement last week, Knox said the appeal court's findings were "not supported by any credible evidence or logic".
"I have stated from the beginning of this long ordeal that I am innocent of the accusations against me," Knox said. "The recent motivation document does not – and cannot – change the forensic evidence: experts agreed that my DNA was not found anywhere in Meredith's room, while the DNA of the actual murderer, Rudy Guede, was found throughout that room and on Meredith's body."
Photos: Rex Features