CNN Chicagoland April 20, 2014 00:05:00
>> reporter: frank is a criminal investigator at the jail. he's also an expert on chicago gangs. >> when you talk about gang intelligence, right here, this room is gang intelligence. there's more information in here than you can imagine. i can solve every murder in the city of chicago inside this county jail. i can do it very easily because everybody talks. >>s there's a guy in division two. >> i need it done today. not tomorrow, you hear? >> reporter: the steady stream of illegal guns flowing in the chicago remains a major focus of his investigations. >> weapons that you guys were getting, ho...
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