No evidence of Raf and Amanda in the murder room? Together with the shard of glass from the staged burglary room, is the bra clasp with Raf's indisputable DNA thereon - the First Instance court rejected contamination claims - and then there is the shoeprint testimony re exhibit photo 105:
"the technicians reported that it was made by the deposit of haematic substance (i.e., blood); the outer edge of the shoe is distinctly visible; nine lightly arced elements are discernable, with a width of ...[various measurements]...corresponding to the ball of the foot. The technicians hypothesised that the print had been made by the heel and the central part of the sole of a left shoe. Based on the small size of the heel and the reduced dimensions [overall], it was held to be a woman's shoe print [Massei's emphasis), of a size between 36 and 38. In any case, it is a shoe much smaller than that attributed to Rudy Hermann Guede."
So you see, there is solid scientific evidence for all three of the defendants in the murder room.
Who do you prefer to believe, the p!sspoor American media who mindlessly claim, "there is no evidence" or employees of the Italian police forensics team?
The expert witness of the above is Dr Lorenzo Rinaldi (Engineer, Principal Technical Director of the State Police, Director of the three sections composed of the Identity Division of the ERT).
Who's next to argue that Rinaldi "is as crooked, bent and corrupt as Stefanoni, Mignini, Maresca, and Italy"? Anyone?
This provides no evidence about Sollecito's presence in the 'murder room'. it does not even provide certain evidence that Sollecito touched the bra. Scientific studies previously quoted (e.g. Goray, M. and R. A. H. van Oorschot (2014). "The complexities of DNA transfer during a social setting." Legal Medicine 17(2): 82-91.) show the DNA could be due to secondary or tertiary transfer. Even accepting the case for primary transfer it says nothing about where or when the contact with the transfer occurred.
As for the 'small' footprint, again examine the evidence, look at the defence and prosecution presentation.
http://www.amandaknox.com/wp-content/uploads/2013/07/Trascrizioni-2009-Sep-18-Paggi-Vinci.pdf
http://www.amandaknoxcase.com/failed-sexual-assault-investigation/
There is certainly a reasonable case that no smaller footprint was present even if there was this is far from providing evidence of identity. Size of foot indicates size of person not gender. Certainly no matching shoe of Knox to the print with identifying individual wear marks were found.
Look at where the facts lead rather than trying to fit the facts to an opinion.