In 2010, there was a homicide. It was ruled self-defense, but I believe you yourself have said even in self-defense it is murder. So no, it wasn't 0 for 2010. I'm sure I'll be able to shoot more holes in your points when I have more free time.
http://usnews.nbcnews.com/_news/2013/04/01/17547970-hundreds-of-teens-mob-pedestrians-on-chicagos-magnificent-mile?lite Seriously, those kids need pistol whipped, not charged with misdemeanors and released.
Two so far in the past month. Not sure how that's on track to continue the rate of less than one per year. Looks like neither were spouses by the way... http://www.wytv.com/mostpopular/story/Youngstown-Man-Murdered-in-Ashtabula/AcwpNZh4DEC2MyxIb-zGXg.cspx