I disagree logically on your (and others) statement about the implications expressed by the category “evidence properly obtained”. It is not true – meaning it is not a strict logical always true statement - that evidence requires to be “properly obtained”, and it is not true that improper techniques (in this case: allegedly improper techniques) necessarily determine the evidence to be invalid. It is not true, besides, that collecting technique was “improper”: and concepts like “proper” or “good” or “correct” are always relative and contextual, they depend on something like, the use, the logical conditions (“good/proper for what? At what conditions?”).
I think the way the authorities collected the evidence in this case leads to a lot of doubt about that evidence, more than reasonable doubt as far as I am concerned.
Finally, you must always bear well in mind that the most important aspect of the pieces of evidence is their being many, in a system, consistent with each other.
I think this is the main point we disagree on and one I have trouble following your logic on. As I have stated before if each individual piece of evidence is doubtful, I tend to view the whole pile of evidence as doubtful. I think the connection to guilt becomes more tenuous as each doubtful piece is placed on top of another rather than the "consistent" nature of that evidence making the individual pieces more convincing.
1.
Meredith's DNA on the knife blade:
Doubtful (In my opinion there was no DNA on that blade at all, there is no proof that it was ever transported and the large bag/large knife for protection theory is pure fantasy. In addition the testing method has not been proven to be accurate and definitely goes against established standards and protocols).
2.
Raffaele's DNA on the bra clasp:
Doubtful (The timing and method of collection is in dispute and the other unidentified profiles increase doubt and also increase the very real possibility that DNA came on the clasp by means other than people handling the clasp. The fact that there is no other evidence of Raffaele's presence in that room also increases the doubt about this piece of evidence.)
3.
Luminol prints:
Doubtful (No evidence of blood, no proof when the prints were made, no proof as to who made the prints, nothing to show that the DNA detected was DNA already on the floor and if it was Meredith's blood you would expect her DNA to be in the vast majority of the samples)
4.
Blood mixed with DNA sample sink:
Doubtful (Amanda lived there and used that bathroom, none of that can be dated and it would normally be found there as a matter of course)
5.
Nara:
Somewhat Doubtful (If she heard a scream it probably was not at the time she indicated she heard it.)
6.
Curatolo:
Doubtful (It appears you agree on this one.)
7.
Quintavalle: No way (Meaning I doubt him well beyond a reasonable doubt for numerous reasons covered several times in this topic.)
8.
Amanda Lied:
Solid (Others here may disagree.)
9.
Raffaele Lied::
Solid (Ditto)
10.
Cell phone evidence:
Some solid, some doubtful, some disputed. (We can get into the individual records if you want, none of the calls proves an alibi, some of the calls seem to show an earlier time of death possibility, there is dispute on this as well as the meaning of forgotten calls, lengths of calls, order of calls, etc).
11.
Motive:
Non-Existent (In my opinion the possibilities that the prosecution and the court have presented are all unbelievable)
I am not doubtful I am forgetting some things.
ETA: I left off the behavior stuff because you indicated you give them little importance but I guess the best way to characterize such things as cart-wheels, noise tickets, sex on a train, etc would be that the significance of these type of things are disputed.