Since the “drug war” began on June 30, 2016, Duterte and his officials have publicly reviled, humiliated and, in one instance, jailed human rights advocates. Senator Leila de Lima, the president’s chief critic, has been detained since February 2017 on politically motivated drug charges in apparent retaliation for leading a Senate inquiry into the drug war killings and, early on, opening an investigation of the Davao Death Squad in Davao City, where Duterte was mayor for more than 20 years. “President Duterte has not only resisted calls to end his brutal ‘drug war,’ but has used populist rhetoric to disparage the brave activists who have been investigating and denouncing his cruel campaign,” said Phelim Kine, deputy Asia director. “Since Duterte will never undertake a serious investigation into the ‘war on drugs,’ it’s up to the United Nations to support an international investigation and bring the mass killings to a stop.”