... spike in murders and shootings — much of it gang-related — shocked Chicagoans, spurred new crime-fighting strategies and left indelible images: Mayor Rahm Emanuel voicing outrage about gang crossfire that killed a 7-year-old named Heaven selling candy in her front yard. Panicked mourners scrambling as shots ring out on the church steps at a funeral for a reputed gang leader. Girls wearing red high school basketball uniforms, filing by the casket of a 16-year-old teammate shot on her porch.