today, investigator franco doma arranges to meet a long-time source nicknamed washington outside citymits. they first began working together when washington was locked up on a gun charge. >> he was known to sell narcotics. he had guns on him, would shoot at people. i like a challenge, you know what i mean? knowing that we've had problems with him in the past, i figured, let me give this guy a chance. what can he tell me? he's provided a wealth of information during his incarceration by providing me with knives, you know what i mean, shanks. at no time did he lie to me. this is a good informant, i have five great informants, and he's probably my best. not only does he tell me about the drugs, he tells me about the violence, potential for shootings, the violence in the inner cities and suburbs of chicago. hey, i'm around the corner. bye-bye. see him in the black coming? you have to ease up here, there's a lot of activity in this area. anticipate i got to provide safety for him. he's walking, he's looking around. he's looking around for his safety. i mean, because people are at him. he's

. >> but investigator franco doma knows that getting to the truth can take time. after vetting the intel they gather from inmates, ciu investigators share their leads with outside law enforcement agencies. this training seminar is for suburban police. the purpose is to highlight the ciu's capabilities and help officers identify the gangs spread nothing their neighborhoods. >> all right, guys, guys and girls, we are going to get started. welcome to the sheriff's department. my name is steven bouffard, i've been with the sheriff's department 13 years, two years in gangs, i have worked all over this compound. give you a little history on the cook county jail. this jail here is probably the largest single-site facility in the united states of america. we have a daily population of about 10,000 inmates, just about every incident in this jail is gang related. violations on their own members. they do hits on staff. they have 24 hours a day to think about ways to get over on us every single day. what we try to do here with the ciu department is track them. >> can tell, th

. >> today, ciu investigator franco doma arranges to meet with a trusted informant. his contact, an active gang member, can identify all the players in a drug ring that dominates a chicago housing project. >> my job is to identify as many guys as i can inside the housing complex. and he's going to give me shooters, drug suppliers, rank. and this is just the one building. i just need you for a few minutes. remember how we do the hierarchy charts? out of those buildings? that's what i need you for. i believe in his credibility because i've dealt with him in the past. he's been in and out of the system. during his incarceration we built a rapport. i raised this kid. all right. remember these what we did last time? you know him, right? who's the main guy in the projects that i need to know about? >> he dead. >> he dead? that's the main guy? so who would take over? somebody with -- on there, correct? so inside that project, what is the dominant drug? what is the drug of choice inside that building? is it the heroin? is it the marijuana? is it the cocaine? >> heroin. >> he