Knox has consistently claimed that on the night of the murder she had been staying with her then-boyfriend Raffaele Sollecito, who has also been convicted of the killing by an Italian court.
The pair were found guilty in a joint trial in 2009, acquitted on appeal in 2011 and then once again found guilty in January this year. They are now appealing for a third and final trial, though Knox has refused to return to Italy to attend any more court hearings.
Latza Nadeau, an expert on the case and the author of a book inspired by its events, told The Times that while the CCTV footage would clearly not help Knox's defence case if it is proven to be her, it would not necessarily help the prosecution either.
Murdered British university student Meredith Kercher. Photo / AP
She told the newspaper: "If the prosecution shows someone like Amanda Knox walking away from the crime scene it's not helpful. For the defence, if there is a video of her anywhere near the house it's not helpful to them because her alibi is that she was at Raffaele's house."
Last week Knox claimed there was "no logic" to the appeal court in Florence's decision to reinstate her conviction for the murder.
It issued a 337-page document saying it was Knox who delivered the fatal knife blow to her 21-year-old roommate, adding that her wounds indicate multiple aggressors and that the two exchange students fought over money on the night of Ms Kercher's death.
Read more:
• Judge: Amanda Knox delivered fatal blow
• Judge hints at a series of 'coincidences' that led to brutal killing
In its explanation the appeal court said that a third person convicted of the murder, Rudy Hermann Guede, did not act alone, and cited the nature of the victim's wounds, as well as finger imprints on her body indicating she had been restrained.
The court said it had evidence of a fallout between the two roommates, including statements by Guede under police questioning that Ms Kercher had accused Knox of taking money from her room.
The document said: "It is a matter of fact that at a certain point in the evening events accelerated; the English girl was attacked by Amanda Marie Knox, by Raffaele Sollecito, who was backing up his girlfriend, and by Rudy Hermann Guede, and constrained within her own room."
It ruled out a previous explanation for motive - a sex game gone wrong - because it was not in Ms Kercher's character.
Guede was convicted in a separate trial of sexually assaulting and stabbing Ms Kercher. His 16-year sentence - reduced on appeal from 30 years - was upheld in 2010 by Italy's highest court, which also said he had not acted alone.
- UK Independent