This is from the Wikipedia page about the case:
'Knox said she barely knew Guede; she pleaded not guilty to all charges, and remained in prison throughout the legal process. Knox and Sollecito's trial began on 16 January 2009 before Judge Giancarlo Massei, Deputy Judge Beatrice Cristiani, and six lay judges at the Corte d'Assise of Perugia.[146]
Knox and Sollecito were accused of having gone to the house on the night of 1 November with Guede, and of having murdered Kercher in her bedroom
According to the prosecution's reconstruction, Knox had attacked Kercher, repeatedly banged her head against a wall, forcefully held her face, tried to remove her clothes, cut her with a knife, inflicted the fatal stab wound, and then took her two mobile phones and faked a burglary
[147]
Guede's shoe prints, fingerprints, and DNA were found in the bedroom, his DNA was found on Kercher and her clothing, and his skin cells were inside her body. Guede's DNA mixed with Kercher's was in bloodstains on the inside of her shoulder bag.[148]
No shoe prints, clothing fibers, hairs, fingerprints, skin cells or DNA of Knox were found on Kercher or in the room [149][150]
The prosecution alleged that all forensic traces in the bedroom which incriminated Knox had been wiped away by her and Sollecito [151][152]'
apart from the whole 'magic DNA removal technique', if there was evidence of AK & RS around the cottage on CCTV, it's never been produced afaik
RG, on the other hand...both DNA & CCTV