to hear the traffickers and find out who's in charge and work our way up the chain of command. >> blakey helped write the illinois safe children's act, a law that gives local police the ability to track pimps and gang members using wiretaps normally reserved for federal drug cases. >> and that particular act is the reason that we're here today. >> the new law resulted in the prosecution of the largest human trafficking case in illinois history. >> what we have seen in recent cases, in one particular case, all the young girls were branded. >> they are literally slaves. >> prosecutor lou longhutano says with the help of wiretaps ten defendants now face up to 30 years in prison. >> we've got telephone conversations of the guys trying to sweet-talk the girls, giving them orders, telling them where to go, girls reporting back. we've even got audiotape of a call where one of the pimps was beating one of the girls during the phone call. >> chicago's efforts to fight the buyers and sellers of women is an all hands on deck approach. from the state's attorney to chicago pd and the cook county sher