You mean such has hers and Kercher's DNA on the murder weapon that had been removed from Knoxes apartment and taken to her boyfriends?
Or her DNA mixed with Kercher's blood outside the bedroom?
Or multiple sets of bloody footprints that matched her size?
Or her lying about being at the apartment?
No evidence at all....
"The murder weapon"?
What murder weapon? There is conflicting testimony as to whether the knife in question
could have even made those wounds. I think all of us have knives in our homes. And I'll wager a few cells of DNA of those who cooked using the knives (which do cut human flesh while chopping food) would be found on our knives.
As someone pointed out, evidence went AWOL and then showed up again. Who knows what happened to it while it was missing? Where was it? Who had it? Why was it missing at all? Any of that evidence was suspect.
As for the footprint, they blamed that on everyone but Santa Claus. Gee, I wonder if they looked at any of the Italian roommates' foot sizes or that of their friends? Come on, we're not talking a specific identifiable tread from a shoe that can be linked to an individual. We're talking a print that could have belonged to tons of folks.
Her DNA was "mixed" with the victim's (in minute amounts) in her own apartment? (outside the bedroom where the body was found....) Wow..... Of course, there's no reason her DNA would be at her own apartment, is there?

Hmmm.....If someone bled in my house right now, it could get mixed easily with the DNA of me, my DH, my DD, my DSis, my niece, my neighbor and a few other folks. In small amounts, yes it could. And all they had on Knox were such minute amounts.
Again, it's too unbelievable that only one person's DNA was on and in the victim and that the other two supposed killers' DNA didn't show up in the same manner. No, their DNA just showed up in ways that are indicative of someone who lived there or was often in the apartment with his girlfriend.
You keep someone from sleeping, eating or talking to anyone on the outside for long enough while you question them in a foreign language (very possibly smacking them around) and you'll get a confession alright. Or you'll get them to implicate someone. Heck, you'll get whatever you want from a lot of people. Hound them to tell you what they
imagined must have happened and then put the spin on it that the story is their version of what actually happened and they look bad whether they stick to the story or change it.
I'm not saying she's a choir girl or even that likeable. I am saying the evidence was slim and suspect. If you take every word the prosecution said as gospel, maybe she deserved to be convicted. But their version vs. the evidence was not enough for a valid conviction. There's doubt as to the murder weapon, evidence was missing right and left before it turned up again, DNA was presented as a match when it was inconclusive.....it goes on and on.
Another thing I've thought of. Had she actually murdered her roommate, I'd have thought she would have hightailed it back to the US. She could have. But she didn't. Who did try to run? Guede, the one whose DNA is in and on the victim. That speaks volumes.