all these people that live around here at night, all this commotion going on all night long and it affects them. undercover officers working johns unit get in position at a busy intersection where johns stop to buy car sex in the busy suburbs. >> she's talking to the guy, can you tell what they are discussing? >> within minutes a guy with a backpack mentions the decoy. as the man walks away, the undercover signals she made a deal for sex. >> a loiter. >> and the chase is on.