In an unusual lawsuit filed July 7, Bosley and Nance-Holt claim their civil rights have been violated by three suburban governments that they say do not adequately regulate gun shops near the Chicago border. The suit argues that weapons sold at these stores are responsible for too much of the violence that disproportionately afflicts this poor, Black corner of Chicago. Critics say the two mothers are stretching the definition of civil rights too far, and are urging the court to dismiss the case. Either way, the suit is timely: Although Chicago recorded the fewest killings in nearly 50 years in 2013, the homicide rate has since been on the rise, darting up 20 percent in the first half of this year.