The whole litany of why the 'murder knife' is bogus is becoming onerous to iterate. I practiced the major ones on CW the other day, he probably thought I forgot who I was talking to. Let's see, off the top of my head:
The DNA was LCN, past the 'too low' setting on the machine, they refused to release the EDF files, and the unlicensed lab makes the risible claim it has never had any contamination. It didn't match the outline on the bed, at least one and probably two of the major wounds, and the last could have been made by anything from a box cutter to a broadsword. The 'DNA' was not blood and was curiously found right on the blade and nowhere else, but the knife was never opened so the cracks where it couldn't be cleaned could be checked for blood traces.
The handle somehow bore traces of Amanda's DNA but not any of Meredith's blood, that being just about impossible considering the nature of the only wound it could have definitely made. It is the only trace whatsoever of Amanda at the site, highly implausible if she was supposed to be wielding it in a vicious struggle. It was plucked from a drawer by 'police intuition' leaving other knives behind and does anyone really believe they planned to eat with it?
Is that everything? I must have missed something, like I did the SMS message when writing the summary the other day. There are just too many damned details to remember about what is wrong with every aspect of this case. It must be so much easier to believe in guilt.
I should switch sides.