Craigslist Heroin

"Despite the city's crackdown, Kai says he has gone untouched by law enforcement for the seven years he's been dealing on Craigslist. In his ads, he lays out strict e-mailing rules for his clients: include only a name and cell phone number. If a potential buyer follows the rules to the letter, he sets up a meeting in a public place—but he arrives without drugs."