Okay, then I am confused. I thought the DNA evidence came from a blood spot on her underwear. How would that be from the manufacturing process?
The blood was JonBenet's, not the killer's. If the manufacturing DNA was already there, her blood just landed on it. As Henry Lee put it a few years ago, if someone spits on the sidewalk, and 10 minutes later a man is stabbed and bleeds on that same spot, the blood will contain both.