"As for the DNA evidence, oh, I'm sure you've got some DNA evidence that probably points to me. Where you got it, how you got it, that's a whole different matter" (Weinberg p.230).
Frediani is trying to imply that the DNA evidence that was found at the scene of the crime on Helena's body was planted. I started to brainstorm and I wanted to know a little bit more about planted evidence. I found an article in the New York Times that I thought was interesting. It takes planting DNA to a whole new level, and describes how DNA can be fabricated, and a crime scene can practically "be built". Check it out its pretty cool and the link is below.