Police reject calls for ban on assault weapons . The year - old boy was shot in the ear , and 12 other people also were injured . Chicago Mayor Max Emanuel cancels a trip to Washington after the shooting . Police call the shooting gang - related ; no suspects were in custody .
Police superintendent calls for ban on assault weapons . The 3-year-old boy was shot in the ear , and 12 other people also were injured . Chicago Mayor Rahm Emanuel cancels a trip to Washington after the shooting . Police call the shooting gang-related ; no suspects were in custody .