while the fastest growing population of users in the country is young, white kids you wouldn't be able to tell here. >> are you seeing a lot of young white kids from the suburbs in these facilities. >> if is outside it is not showing up in this jail right now. >> why do you think that is given the fact the population seems to be exploding? >> that population may not be getting arrested. they may be that active young culture that is avoiding being arrested even though they are using illegal substance. >> reporter: in chicago, black americans are eight times more likely to be stopped and frisked by police than whites which increases their chances of getting arrested and landing here. out of the estimated 1400 inmates who have used heroin, only a fraction will get help with their addiction behind bars. ♪brother brother can't you see ♪ >> this is division 6, home to