Study: Gun Homicides Increased 25 Percent After Missouri Repealed Background Check Law
Webster found evidence that the expiration of the law resulted in a sharp, roughly 25 percent spike in the homicide rate in Missouri despite the fact that gun violence was declining nationally and reigonally:
Preliminary evidence suggests that the increase in the diversion of guns to criminals linked to the laws repeal may have translated into increases in homicides committed with firearms. From 1999 through 2007, Missouris age-adjusted homicide rate was relatively stable, fluctuating around a mean of 4.66 per 100,000 population per year. In 2008, the first full year after the permit-to-purchase licensing law was repealed, the age-adjusted firearm homicide rate in Missouri increased sharply to 6.23 per 100,000 population, a 34 percent increase. For the post-repeal period of 2008-2010, the mean annual age-adjusted firearm homicide rate was 5.82, 25 percent above the pre-repeal mean. This increase was out of synch with changes during that period in age-adjusted homicide rates nationally which decreased ten percent and with changes in other states in the Midwest which declined by 5%.
http://thinkprogress.org/justice/2013/02/13/1589161/study-gun-homicides-increased-25-percent-after-missouri-background-check-laws-repeal/