Actually this about handle covered in blood is an innocentisti interpretation of the stain. My interpretation is very different, and doesn't have any handle print.
This was the print (sorry only low resolution allowed by forum):
[qimg]http://www.internationalskeptics.com/forums/imagehosting/thum_4347454c520207a87a.jpg[/qimg]
And this my interpretation, its overlapping with the blade:
[qimg]http://www.internationalskeptics.com/forums/imagehosting/thum_4347454c520b91f08a.jpg[/qimg]
The blade is very large, it gets dirty with blood for about 12-13 cm, the handle has nothing to do with the print.
I am very perplexed by your objection to Stefanoni. It is both unfounded on point of law, as well as on grounds of facts based on the transcript of Stefanoni's 2008 testimony.
First it is not true that Stefanoni doesn't work as a forensic. In fact she was not only working as a molecular biologist in the laboratory, she was also directly involved on the evidence collection. She was at the crime scene and directed the whole sessions of evidence collection while she was there; not only she analysed items at the laboratory, in fact she also chose what items would be worth collecting and testing, based on her own assessment about the crime dynamics, as well as the order to follow for items collections.
Under many effects she acted as a crime scene manager - limited to the sessions where she was allowed - and a forensic invesigator, not only as a laboratory scientist. She did not just test fingernails swab samples for DNA, for example: she actually went to the morgue before the body was washed, observed Meredith's fingernails and took herself the swabs for each finger. She made decision about sample collections on each item based on her forensic experience.
It is obvious that she would testify about this activity of her.
But then, also as for trial papers, it does not seem correct - on grounds of facts - what you attribute to Stefanoni's testimony. What she in fact testifiied about sample A on the knife handle, was about why she chose to that particular point on the handle for DNA testing. She said that she chose that particular spot because, based on her 15-year experience as forensic, on stabbing, the murderer's DNA is found more often on that part of the handle, since a very big force is applied there in a stabbing movement. And also, based on her experience, in a superficial washing the murderer may easily "forget" to accurately wash that part of the handle, as the handle is rather big and during a one may tend to clean the other more extended areas.
So the testimony of Stefanoni was an answer about
why she chose to test that particular spot of the handle.
I fail to see how this could be seen as unethical.