Several big U.S. cities see homicide rates surge

Several big U.S. cities see homicide rates surge:
"After seeing years of decline in violent crime, several major American cities experienced a dramatic surge in homicides during the first half of this year.
Milwaukee, which had one of its lowest annual homicide totals in city history last year, has recorded 84 murders so far this year, more than double the 41 it tallied at the same point last year.
...Baltimore, New Orleans and St. Louis have also seen the number of murders jump 33% or more in 2015.
Meanwhile, Chicago, the nation's third-largest city, has seen the homicide toll climb by 19% and the number of shooting incidents increase in the city by 21% during the first half of the year.
In all the cities, the increased violence is disproportionately impacting poor and predominantly African-American and Latino neighborhoods. 
In parts of Milwaukee, the sound of gunfire has become so expected that about 80% of gunshots detected by ShotSpotter sensors aren't even called into police by residents, Flynn said."