you will find girls that are improperly dressed. you will find high heels, lingerie, condoms, lubricants. does anybody sleep here? >> nobody. >> another indicator of human trafficking is any evidence that women are actually living on the business premises. like fully stocked kitchens, mattresses, and drawers stuffed with underwear. >> see, too many clothes here, too. what do you need all these clothes for? that's fancy massage. special massage? geez. >> today inspector walsh is following up on a tip that sex is for sale on the premises of this massage parlor in the city's mission district. >> ky jelly. five girls. >> after a quick search of the rooms, he turns his attention to identifying the women working here and checking them for valid massage permits. >> you've been here a long time, huh? working here. >> this response is funny, perhaps, because it is obviously false.