steve ravella says no matter their station in life, the johns' excuse is always the same. after 20 years in vice watching exploited women suffer, ravella doesn't suffer any fools? >> they are just out there to be satisfied is what they are looking for. >> remember not to go on the other side of the building line. >> it's quitting time on friday night and the johns takedown team keeps a watchful eye on their decoy mary. >> have her say something. >> copy that. >> within seconds, two men check out the bait. >> you guys picking up anything on the wire? >> the two refuse to bite but it doesn't take long for the decoy to get a bigger fish, one that promises to be a whale. >> as mary disappears around the corner, ravella closes in on a silver mercedes benz. >> are you guys able to pick her up? >> turn off the engine, put it in park, put the brake on. face the car, hands behind your back. the girl you talked to is a police officer. you're under arrest for a prostitution-related offense. >> i didn't solicit her. >> i'm going to talk to her and find out exactly what was discussed. i