The 'kids' left no evidence behind of any involvement in the murder. Traces of people in their own living spaces are not unusual. They are mandatory. What you need as evidence is time stampable - something that is entirely and irrefutably inconsistent with innocence.
The only person for whom this applies is Guede.
If it could be proven that Sollecito's print in Kercher's blood was on the bathmat, he would be in prison right now.
Where are his bloody shoe or foot prints in Kercher's room? If his blood was on his foot so as to make a print on the mat then evidence of his presence in Kercher's room in blood would also have been found. Whoever left the print on the mat was in the room. The only person with time stamped evidence of his presence there was Guede.
I hesitate to see any benefit or enlightenment to engaging with this increasingly hysterical, fantastical, and frankly unhinged nonsense. I've never really understood why educated rational people still choose to engage with, for example, the nutters who still claim that the NYC Twin Towers were brought down by a US Government conspiracy, or the nutters who still claim that there's an enormous dinosaur-type creature living in the depths of Loch Ness. Such people are either deluded, mentally ill, deeply lacking in self-esteem, irrationally anti-establishment (or anti-prevailing-viewpoint), seriously misguided in their assessment of their own intellects and reasoning/critical-thinking skills, or some or all of the above.
Vixen is wrong about pretty much everything in respect of Knox, Sollecito, Guede and the Kercher murder. That much is transparently obvious to anyone with decent analytical abilities, proper critical thinking skills, proper understanding of the facts of the case, and proper objectivity. And now we're reading hysterical claptrap with ludicrous (and, needless to say, entirely unsubstantiated) rants about "big money" payoffs, conspiracies with TV documentary makers, crazy and wholly-invented (but extremely telling) fantasies concerning jealous rages related to the relative "beauty" and character traits of Kercher and Knox, and long-discredited elements presented as "facts". It's all arrant nonsense.
And just as one could spend hours, days, weeks of one's time explaining patiently to a 9/11 conspiracy theorist exactly how and why the Twin Towers came to collapse, and who was directly (and indirectly) responsible, yet the nutters would simply suck it up and come back with more of the same old nonsense about "Thermite", "Big Oil", and so on and so on..... so one can
spend waste hours, days, weeks of one's time arguing with the small band of over-invested, deluded individuals who still insist that Knox and Sollecito participated in Kercher's murder (and that there's "ample" evidence to prove it, and that the dissenting courts were "bought off", etc etc etc....).
It's just not worth it, and it's of no use form an educative or enlightening perspective (though I suppose there might be some argument to be made that it has some strange entertainment value). Those of us who for so long argued that the credible, reliable evidence clearly provided zero grounds to convict Knox or Sollecito for the murder, that pretty much all of the state's original "evidence" against Knox and Sollecito was actually fundamentally unreliable (and in some cases fabricated and/or wilfully misrepresented to courts), that all the credible, reliable evidence pointed extremely strongly to the conclusion that neither Knox nor Sollecito had anything whatsoever to do with the murder, and that all the credible, reliable evidence pointed to (and was wholly compatible with) Guede acting alone - those of us who for so long argued all of those things were CORRECT. It's over. There's as little point arguing with the pro-guilt crowd by now as there is arguing with a rabid 9/11 Truther.
Of course, there's a big caveat to all this. If any new real, credible, reliable evidence were ever to be found and presented which cast new light on the case, all rational observers of the case would be duty bound to consider it carefully. And if any such new evidence were to, for example, point towards the participation of Knox and/or Sollecito in the murder, any rational observer would naturally reassess his/her conclusions in that light. In exactly the same way, if a deep-water submersible vehicle in Loch Ness were to film the clear indication of a very large, moving/swimming non-mechanical object deep in the loch, any rational observer ought to re-evaluate his/her conclusions about the existence of the "Loch Ness Monster". But until/unless something like that happens, I will continue to hold the firm belief that there is no "Loch Ness Monster". Likewise, in the absence of any proper new reliable, credible evidence in respect of the Kercher murder, I will continue to hold the firm belief that neither Knox nor Sollecito had anything to do with the Kercher murder, and that beyond all doubt neither should ever have been found guilty in a criminal court of charges related to the murder.
It really, truly is time to disengage with pro-guilt commentators in respect of the murder - unless and until they might present any new, credible, reliable evidence pointing towards the participation of Knox and/or Sollecito. There's still some element of debate to be had about Knox's criminal slander conviction, though the game is pretty much up on that one too. Outside of that, I suggest that all rational pro-acquittal/pro-innocence commentators do what they might easily do with "US Govt Thermite brought down the Twin Towers" nutters - ignore the misguided and curiously-motivated rants of the pro-guilt community, while perhaps allowing yourself a wry smile at their delusion, ignorance and misplaced zeal.