Bug
(Rob, it's about a kid who, with his cronies, delights (in the most perverted ways) in the most violent crimes imaginable -- until he arrested and forcibly subjected to behavior modification which leaves him unable to commit any violent acts even in his own defnse (at which point in the novel the heinous violence starts being committed against him), then he becomes forced into becoming a tool for an anti-fascist movement until he throws himself out of a building. This caused bad press for the program that had altered his behavior, so the government reverses the behavior modification. Our lovely protagonist returns to his life of violence until (in the last chapter which is omitted in the American version of the book and is also not included in the movie), ultimately, he decides it's boring, so he retires to attempt to become a productive member of society. Although he hopes to have a kid, he believes his child will be just as depraved as he is.
See why it was sick to think Cat would finish that? Hasn't she damaged enough stuffed animals?
Did you actually follow that story synopsis?
