A reward of up to $100,000 is being offered by the FBI and Crime Stoppers for any information that leads to the arrest and conviction of the persons responsible.
Mayor Rahm Emanuel pushed specifics on the federal help that might be available for Chicago city in his meeting with Attorney General Jeff Sessions.
Children as young as 10 years old were arrested in gun crimes from 2013 and 2016 in the United Kingdom.
A landmark gun seizure law recently took effect on January 1 in California, allowing gun confiscation without notice.
