Accidental shootings? According to Richard Tremblay, who has spent decades researching this, "Babies do not kill each other, because we do not give them knives and guns. The question we've been trying to answer for the past 30 years is how do children learn to aggress, but that's the wrong question. The right question is how do they learn not to aggress." As for the second link, the distribution of violent crime by state http://www.fbi.gov/about-us/cjis/ucr/crime-in-the-u.s/2011/crime-in-the-u.s.-2011/offenses-known-to-law-enforcement/standard-links/region shows that the south is more violent than the north. Why? Well that would be the irish influence, the civilizing process started in England and swept across Europe, lagging behind somewhat in Ireland (and Spain). In short, if I was one half of a spanish/irish couple about to move to a remote corner of Ireland with a couple of miniature psychopaths in tow, I would make sure those floorboards are good and creaky and would avoid starting any feuds with the locals anytime soon.