Well ... let's dissect the appeal paragraph.
The defense argues that documentation was withheld.
The actual DNA testing dates were withheld.
Testing dates were omitted in the report (I'm not sure what to make of this since the defense was invited to the testing), and the implication is that if the defense had that exact information, then perhaps they could better argue that the DNA on the knife was a result of contamination.
The DNA testing dates are vital because they would show that Meredith's blood and DNA were analyzed in the days immediately before the knife DNA testing, providing additional evidence that the low copy number DNA results were from contamination. The knife would have been tested in a lab environment containing abundant amounts of Meredith's DNA. Documents containing this information must be released to the defense.
The following says that documentation of some steps of the bra clasp DNA analysis were missing.
Documentation related to the bra clasp was missing some of the steps that were taken during analysis. All steps should be provided with nothing omitted. The credibility of this piece of evidence is discussed in great detail in the beginning of the appeal. There is no excuse for these documents to be withheld.
Alleging that the lab omitted some information that could be used to argue faulty testing is a far cry from alleging that the prosecution deliberately withheld lab reports.
Could you refer me to the paragraph in either appeal where it is alleged that prosecutors withheld information? I can't find it. I can only find information alleging that the lab omitted information that the defense wanted in order to argue that the lab results are faulty.
Regarding the handwritten note about "too low", I thought that was well known and part of the trial materials.
Re the reputed "too low" note, I may have misunderstood whether that was on the disclosed or nondislosed pages. It was just an example anyway. It may be as simple a matter as the prosecution asked the lab to push the scientific envelope in drawing conclusions and didn't want the defense to see the supporting data that made the fudging apparent.
As I said, a prosecutor may well claim that pages weren't disclosed to the defense by "accident." It is nearly always a lie. The judge and defense know it is a lie, but also know it is nearly impossible to prove a lie. So everybody plays the game.
And what I do know, after 20+ years of working for law firms, is that except in cases of the most extreme criminal corruption (I've never heard of such a case, actually, I'm just allowing for its theoretical possibility), the lab does NOT decide what is divulged and what is withheld. That is all done at the instruction of the prosecution (often under orders from the Court). There may be cases where "certified" copies must be provided by the lab itself, but the prosecution has the basic info and can divulge it to the defense without the lab's knowledge or participation.
Saying "we didn't get the lab report" (or the "police report") is just nomenclature for clarity. All disclosures to the defense are understood to come from the prosecution. (The reverse is equally true.)
In the U.S. every page divulged to the opposition is "Bates-stamped" with a unique number so that it can be clearly identified in all pleadings and throughout the trial. One reason docs don't go directly from the lab, say, to the defense, is that each page has to be Bates-stamped by the side divulging the document. (The Prosecution has its unique sequence of numbers; the Defense has another.)
I will be seriously shocked if Italy doesn't have a similar system. There's simply no other way to keep up with the thousands of pages involved in modern litigation, criminal or civil.
So, yeah, the defense is saying they didn't get all the pages from the lab. The implication is that the prosecutor withheld them. If pressed, Mignini may claim an error was made in the lab, and the lab director may well "fall on his sword" if required to do so. But that stuff is all show biz.