What was proven? All eight points I cited.. you know, the ones you're too dishonest to address.
It was the Hellmann court (a de novo court, i.e. a fact finding court) which appointed two neutral DNA experts to review the results. It was their conclusion that due to all of the various errors made by the SP, the results could not be considered reliable. Several other forensic DNA experts weighed in and concurred with C&V's opinion regarding the errors and the unreliability of the results.
Of course, you'll attempt to dismiss C&V, just like you do everyone else you disagree with, and you'll ignore all of the proven points that support C&V's conclusion. I'm not sure if this makes you dishonest, misinformed or a victim of your own confirmation bias - maybe all three.
And, of course, you'll fail to acknowledge the defense did not need to prove his DNA was there due to the errors. Indeed, it's not possible to prove it, which is why forensic standards are so strict. All that was needed was to prove the failure of the forensic team to follow procedures and protocols designed to minimize the risk of contamination. Once that was proven (in spades!) the results couldn't be deemed reliable. Marasca understood that.