Looks like his argument is something along the lines of "I ended up having to kill her because the state wasn't taking notice of my many complaints against her. Therefore it's the state's fault and it's not fair that they should be put in a position of judgement over me for having taken action precipitated by their negligence"
Oh, ha, and it gets better/worse: part of the terms of his deal with the prosecutor for leading them to the body (and getting his conviction reduced to second-degree murder) was that he can't appeal anyway:
