Sara: It's possible that this one is just a coincidence.
Keppler: It's not.
Catherine: How do you know?
Keppler: Because I do. This guy pays attention to the details. He knows what he likes, doesn't mix it up. The thing that gets me is the discipline though, he's got a habit but he seems to be able to control it. Only needs to kill once every ten years or so and when he does, he's got a type.
Nick: Pretty but not pricey.
Keppler: And not likely to be missed.
Catherine: You're a CSI, not a profiler.
Keppler: What's the difference?
Catherine: Evidence. I want leads and ID's. Follow up on what you've got.