From PJ Media:

Crime rates in Chicago dropped dramatically in 2014 after the state of Illinois allowed legal concealed carry. From the Washington Times:

[T]he number of robberies that have led to arrests in Chicago has declined 20 percent from last year, according to police department statistics. Reports of burglary and motor vehicle theft are down 20 percent and 26 percent, respectively. In the first quarter, the city’s homicide rate was at a 56-year low.