It was voluntary manslaughter and imperfect self-defense (when someone who kills another believes they are acting in self-defense but that belief is not reasonable under the circumstances).
The problem for him if he is correctly convicted is intent. You don't get a year when you intend to kill someone. Sentencing guidelines are probably going to call for 3-10 years.
I think, but I'm not sure, but that would mean that he would probably be out after about 15 months, with good time served. :dunno:
Then he can go on the book circuit.