De Lima's resolution mentioned the need for the United Nations inquiry in light of the testimony given by self-confessed hit man Edgar Matobato to her erstwhile justice committee implicating the President in the killings of 1,000 people, mostly criminals, when Mr. Duterte was still Davao City mayor.
The senate inquiry, led by de Lima, included an account by former death squad member Edgar Matobato, who testified that Duterte was responsible for killings during his time as mayor of Davao City. Leila de Lima, was accused of trying to take down the president, which prompted calls for her to be removed from her position as chair of the Committee on Justice and Human Rights. Colangco claims he had a brief talk with De Lima in January 2014.
Andanar said the Office of the President had not interfered with her committee's investigations, and that Mr. Duterte had even allowed the National Police chief, Director General Ronald dela Rosa, to attend and testify at the Senate hearings.
He accused De Lima, in her desire to destroy the President, of "destroying the integrity and reputation of the Senate".
Sen. Alan Peter Cayetano, a key ally of Duterte, said in a speech that de Lima used her committee to tarnish the image of the president before the global community.
De Lima did not attend Tuesday's congress hearing and gave a speech at the Senate defending the investigation.
According to the Philippines national police, almost 3,000 drug-related killings have been reported since Duterte assumed office June 30.
He was then approached by Joenel Sanchez, De Lima's security aide, two weeks to re-establish Sebastian's offer to support the plans of De Lima's senatorial bid in the 2016 elections.
"It is hereby resolved, in view of the foregoing reasons and circumstances, the Senate respectfully urges the Executive Department, through the Department of Foreign Affairs, to extend an invitation to the Special Rapporteur on Extrajudicial, Summary or Arbitrary Executions, Ms. Agnes Callamard, to conduct a visit to the country and perform inquiries or investigation on the unprecedented phenomenon of extrajudicial killings and summary executions that has arisen during the aggressive enforcement of the administration's war on drugs", the resolution said.
Duterte has hit back against De Lima with a string of personal attacks. Another former inmate, speaking on live television, disclosed De Lima's telephone number and home address. "We believe there's no basis for the motion", Drilon said. In response, Duterte said he is willing to explain the killings to the global body, who he criticized for its supposed inaction in conflicts like the war in Syria.
The presidential adviser said that De Lima is now using the President as a scapegoat for her ouster even if Duterte had continuously defended the independence of a co-equal branch of government.
On Sunday, Duterte asked for a six-month extension for his war on drugs and said the investigations into possible human rights violations would not stop him from continuing to crack down on drug dealers.
Hontiveros said: "On behalf of Akbayan party, I respectfully register my objection".