The middle-aged man had fled Cambodia to save his family from the genocidal Khmer Rouge. Now, as he stalked furiously back and forth across the grimy patio behind a cramped bungalow in the Little Phnom Penh section of Long Beach, he saw a very different threat materializing -- within his own family. His 14-year-old son, gang-named Flipper, and another homeboy, Slicc, 18, were bragging to a stranger about a shoot-out.
"I'm on the corner phone with my girlfriend," Slicc recounted. "The Mexican drives up and yells, 'What set you from?' I yell it ain't none of his business, and he busts...