I actually think she's a kind of nasty (which shouldn't be too surprising since Hall played a pretty convincing homo in Six Feet Under LOL
), but she's a good actress and Deb is a great character. She's a better character in the novel series though. She knows he's a serial killer and she's in charge of the force. Also in the book, he's considering training Rita's kids to become killers because they been damaged like him and have the same problems and they are even blackmailing him sort of to do it.
The fifth book is supposed to get into cannabilism but doesn't come out until some time next year