The alleged shooters of Hadiya Pendleton failed to press charges from an earlier shooting, preferring retaliation instead, according to police. We speak with CureViolence's Ameena Matthews and executive director of the mayor's Office of Public EngagementFelicia Davis on gang culture on Chicago Tonight at 7:00 pm.

Related Links:

DNAinfo article on Hadiya Pendleton's alleged killers' arrest

Marketplace article on the economic impact of Chicago's violence

More on Cure Violence