HIGH TIMES AT NEW TRIER HIGH

Even with his leather jacket, wraparound shades and permanent slouch, Matt can't quite pull off the menacing air people attach to drug dealers. Maybe it's the fact that he operates under the stately trees of Chicago's wealthy North Shore, or that he is only 17 and wears braces. He parks his late-model Lincoln in the student lot and saunters through the after-school crowd loitering on "Smokers' Corner," a short block from New Trier Township High School. Matt talks the language of business, not crime. "The way to make a large sum of money is with repeat customers," he explains. "With me,...