Haing S. Ngor survived the Khmer Rouge, only to be shot dead outside his Los Angeles home. His raw performance in the 1984 film, “The Killing Fields,” won him an Academy Award and brought international attention to Cambodia’s genocidal Khmer Rouge period. At the time of his murder, Ngor lived between worlds: Hollywood and post-war Cambodia. He was admired, but also resented. Who Killed Haing Ngor explores his extraordinary life, and investigates the leads the LAPD missed or ignored.