steve ravella says no matter their station in life, the johns' excuse is always the same. years in vice watching exploited women suffer, ravella doesn't suffer any fools. >> not at off. they're just out there to be satisfied is what they're 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. >> copy. >> the two refuse to bite. >> a mercedes pulled over. >> copy. >> 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

. -- inspector steve ravella. >> they'll be getting out of the van. >> for the last decade, his teamaces to the anonymous men who perpetuated the exploitation of the vulnerable. >> another confirmation that the wire is working. >> with all units in position, the undercover decoy works the evening's first stroll. >> a good little spot. you can see her. when the lights are on above her. >> within moments, a man approaches the undercover. >> the guy in the black beanie, white shirt, black vest, black pants. a male in his 40s. >> they're walking together. >> no signal yet. >> not yet. >> she's following him to a liquor store. >> i got her. still talking. no signal yet. >> there it is. good signal. >> i'm going to open the door. >> the window, the window. >> i can't -- >> put the bag down. put the bag down. get up, stand up, stand up. you want to go down? relax your hand. don't tense up. all right. stand up, stand up, stand up. do you speak english? >> no. >> can you walk back with him, with the guy? walk back? >> this john who spoke english just moments before with the decoy now claims h

meet inspector steve ravella. a 19 year veteran who leads the police department's efforts to crackdown on predatory men. >> you're under arrest for prostitution related offense. if you don't have any warrants, you'll probably get a ticket and be on your way in about 20 minutes. who wants the honors of driving the car back? >> over the years, he has arrested thousands of working professionals. like this man, men who pay cash for street sex. >> that address on your driver's license, that still good? >> weekly sting operations like this one deliver much needed consequences to the men who prop up an industry built on the exploitation of women and children. >> have you been arrested for this before? >> say again? >> have you been arrested for this before? >> what were you arrested for? we have a number that shows you were arrested in the city before? >> that was for -- >> like dui? >> sleeping in the car drunk. >> go ahead. >> arrested for dui and failure to stop at a red light. >> thank you very much. >> since ramirez