transferred to a penitentiary or they are set free. >> are you affiliated? you're lying, man. don't lie to me. just keep it real. i'm not going to say anything. i've seen guys grow up, they come in with no hair on their face, they leave, they are grown men now. >> i've been in the system since i was 15. i'm 33 now. it is like a revolving door. >> you recognize them, they recognize you, it is like, what did you do now? >> it is survival here. my goal here is to have a one-inch deck and then i've conquered my job. >> for ciu investigators the cycle of new inmates means their work never ends. the jail represents a key battlefront in chicago law enforcement's war on gangs and drugs. >> the city of chicago supplies us with probably 95% of our population. and chicago has an estimated 100,000 gang members. >> our approach here is that the