Yi Chao, 72, Simi Valley

A friend took the Cambodian immigrant to his eye doctor appointment in downtown L.A. But he decided to take the train back home.September 15, 2008A friend drove Yi Chao to his eye doctor appointment Friday in downtown Los Angeles. But Chao decided to take the train back home to Simi Valley, where the 72-year-old Cambodian native lived with his son Kong Chao. "I called him at 4:21 p.m.," said Kong