GENEVA — The brutal killing of 57 people in Maguindanao, including some 30 journalists, should be seen as a watershed moment for the Philippines, according to two United Nations human rights experts. Philip Alston, Special Rapporteur on extrajudicial executions, and Frank La Rue, Special Rapporteur on freedom of opinion and expression, said that “the pre-meditated killing of political opponents, combined with a massive assault on the media, must be tackled at various levels that go well beyond standard murder investigations.” In a statement, the two UN experts indicated that the initial responses of the Government had been encouraging. “The first step”, they noted, “is to ensure that the police investigation is comprehensive and independent, and employs the highest professional standards. It must also be followed by effective prosecutions of all those responsible for the killings.” They added, however, that the massacre also demanded a more extensive reflection on the elite family-domi...