One night in late October, a college student named Chen Xiaofeng was in-line skating with a friend on the grounds of Hebei University in central China. They were gliding past the campus grocery when a Volkswagen sedan raced down a narrow lane and struck them head-on. 

 

The impact sent Ms. Chen flying and broke the other woman’s leg. The 22-year-old driver, who was intoxicated, tried to speed away. Security guards intercepted him, but he was undeterred. He warned them: “My father is Li Gang!”