From Bearing Arms:

New data out of California provides more evidence that the presence of legal gun owners and lawful gun carries doesn’t increase crime.  The Fresno Bee recently reported that Fresno County has the highest number of concealed carry licensees in the state, followed by Orange County.  If “more guns equals more crime”, then more people carrying guns should lead to more crime as well, and yet both Fresno and Orange County have lower homicide rates than Los Angeles County, home to more than 10-million residents but just 424 concealed carry licensees.