I have a vague memory of a book in which a killer (perhaps a serial killer) says "There. There." as they stab someone. I think the killer is female, but I am not certain of that. It even might be some means of killing other than stabbing. I think the killing is retribution for some kind of abuse. Note that I am NOT referring to Randy Lenz in Infinite Jest (reading that section of the book is what dredged up the memory).
Additional details: the book was a novel, written in English ten or more years ago, I believe. Not SF or fantasy, not noir. Set in the contemporary US.