(...)
Is this to infer that there is a causal relationship between the floor being dirty and the clasp being dirty? There is a common refrain elsewhere on this board that "correlation does not imply causation". Did the floor cause the clasp to become dirty or did the clasp cause the floor to become dirty? We can surmise that the floor being much larger than the clasp, it is probable that more contamination transferred from the floor to the clasp but there would still be some contamination transfering from the clasp to the floor. Can we see the exact spot on the floor where the clasp was found? I seem to recall it being towards the center of the room but everyone examining the clasp have huddled in the corner by the desk for some reason.
I don't see any sense in the discourse above.
The floor is dirty on Dec. 17. The bra clasp is dirty when located on Dec. 17.
These truths have an implication => the glove will get dirty on picking the clasp.
This is an amazing observation. Others have even made this same observation and there is a solution to this very problem. The forensics kit includes disposable sterile tweezers that can be used to pick up small items and place them into the evidence bag thus avoiding the contamination issue.
This statement has an implication, that is
if there was no stockpile of disposable tweezers available, the problem has no solution.
Unless there is a stockpile of disposable tools there's no solution; so if there is no stockpile of tweezers, there is nothing else to do.
However, the "problem" may be very petty, basically non-existent; since in fact the room was already rummaged into and not clean, and thus the reasoning could be reversed to draw the opposite conclusion: the observation that the room was already not clean would make the use of disposable tweezers useless.
The other part of the statement about Stefanoni's glove getting contaminated the exact moment the carpet is lifted from the clasp would be called "spooky action at a distance" but we are not talking quantum here. Stefanoni was not present when the carpet was lifted. It's the man holding the flashlight that lifted the carpet and he doesn't stop to change his gloves before touching the clasp and handling it when it is passed around.
But they didn't use their gloves to pick up other items. By "items" I mean evidentiary items, or items that may have a tight correlation with Raffaele Sollecito.
You will of course claim that this doesn't make any differerence because Raffaele's DNA is not supposed to be in that room.
Correct.
But for several days in Noveember and all morning prior to the clasps rediscovery and possibly even on the 13th of November, people were tramping around the cottage wearing those little bootie DNA magnets. And they were wandering in and out of the rooms and through the common areas in those little booties. And nobody changed their booties before entering any room. And somewhere between the first discovery of the clasp on November 3 and the rediscovery of the clasp on December 18, someone stepped on the little clasp and crushed one of the hooks. Raffaele's DNA which is legitimately in the common room is transported into Meredith's room and deposited with this foot that crushed the clasp hook or deposited on the carpet that the man holding the flashlight moved with his glove that he didn't change.
There are some bit that require correction in this description.
First, the "trampling around the cottage" should not be taken ad litteram, because those who entered Meredith room did not trample into the other rooms, except the corridoor.
But a more relevant factual datum is that it is
false that someone stepped on the clasp and crushed one of the hooks. This never happened: the hook was already crooked when it was spotted first on Nov. 3, as the pictures from Nov. 3 show.
However, this still is not all that needs to be said. In fact, the dirty scene, but even an alleged trampling around and stepping on the hook, won't change the basic picture. Even those alleged (never happened) events wouldn't make the presence of Sollecito's DNA on the clasp become likely. Not even in a remote figure.
There was no DNA of Sollecito's on the cottage floor. More than 20 DNA samples were taken from the cottage floor, including the area close to Meredith's door, and no trace of Sollecito's DNA was found.
All those had been trampled upon, since many were picked on Dec. 18, yet there is no DNA of him in none of them.
The alleged forensic should have trampled in a large pool of Sollecito's DNA picked it up on his/her sole and brought it everywhere around, in order to make the finding on the bra clasp become somehow possible, even though in a tiny, remote statistical figure.
Where is the source of Sollecito's fluids, where is the pool where the forensic stepped and picked up the bioogical cells?
Nothing like that was found on the scene. No evidence or clue about the existence of this source of contaminating agent.
(...) This is implying that Stefanoni's glove was tested for DNA. We need to add this to the list of suppressed DNA results.
Chuzpah is not going to take your argument very far.
Of course, everyone that is paying attention knows that the clasp was not specifically contaminated with Sollecito's DNA. It was contaminated by a mixture that included the DNA from at least 3 males and possibly more. It's too bad that the DNA result from Stefanoni's glove was suppressed. That might have cracked the whole case and told us who really murdered that girl.
This is no argument. Ad for what Halkides called the "Axiom N. 1" of DNA analysis, the dating of a DNA trace can never be inferred from the properties of the genetical material itself.
You cannot use the presence of some alleles or some profiles in order to draw inference about the origin of other DNA material.