N-no but sentient, dark mirror images is an idea that goes back a long time.

[Reid considers that a moment]

You have to look at their habits, their history and their psychology as well as the victims they take. If they're ashamed, they're going to pick somewhere hidden from sight. If they're boastful and daring someone to find out, they're going to pick somewhere more public. If the crime is sentimental, it's going to be some place sentimental.