reported a few years ago at least 70,000 gang members reported a few years ago at least 70,000 gang members reported a few years ago at least 70,000 gang members at least 70,000 gang members at least 70,000 gang members at least 70,000 gang members reported a few years ago at least 70,000 gang members By the numbers: Chicago-area gangs reported a few years ago By the numbers: Chicago-area gangs at least 70,000 gang members reported a few years ago reported a few years ago rival gangs reported a few years ago