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The revelations of Peter Joemel Advincula, a man who claims to be the hooded figure in a series of anti-Duterte viral videos, were meant to blacken and silence the opposition, defeated senatorial bet Gary Alejano said Friday.

Speaking to ANC, Alejano said Advincula has lied and changed his story several times in the past 3 years - first linking ex-President Benigno Aquino III and other officials to drugs, and then linking President Duterte's allies to drugs, before again changing his story and linking the Liberal Party and other opposition members to a plot to oust the President.

"Kita mo yung script. Ibig sabihin, 'yung in-accuse mo, i-clear mo. And then 'yung kalaban nang administrasyon, 'yung opposition idiin mo. Maliwanag naman 'yun. In one whole sweep, lahat ng opposition pinangalanan mo na lahat. Ridiculous," he said.

Advincula, who has claimed to be "Bikoy" - a hooded figure in the "Totoong Narco-list" videos, claimed Thursday that he was funded by Sen. Antonio Trillanes IV to make the videos.

He also named several individuals linked to an alleged plot to oust Duterte including Trillanes, Vice President Leni Robredo, a certain Attorney Salvador and others. Secret meetings were held in De La Salle University and Ateneo de Manila University to discuss the plot, he claimed.

Trillanes, Robredo, members of Otso Diretso and even officials of the two universities have debunked Advincula's claims.

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In the interview, Alejano said Advincula has yet to show proof he is the same hooded "Bikoy" in the viral videos. "Is he the same guy?" he asked.

He also said he had backed an investigation into Bikoy's claims that drug money flowed into several bank accounts of Duterte's son Paolo Duterte, his son-in-law Atty. Manases Carpio, and former aide Christopher Go "because the details would have been easy to verify."

"When Duterte said Trillanes had offshore bank accounts, mabilis kaagad i-verify. Trillanes issued a bank waiver on those accounts. In the same way kung 'yung accounts na 'yun are not true, those people involved could issue bank waivers to prove that they are not involved in that," he said.

"It should be treated seriously because the war on drugs is the central policy of this administration, therefore it would be ironic if the allegations are proven true," he added.

He also questioned the decision of the Philippine National Police to allow Advincula to conduct a press conference in Camp Crame without first validating his claims.

"Parang nakakalungkot that the PNP allowed Bikoy to conduct a presscon at Camp crame considering the fact na hindi pa nila na investigate kung tama ang sinasabi ni Bikoy," he said,

"May nakikita ka kaagad na bias on the part of the PNP because they allowed Bikoy to speak before the public with their presence...They will investigate. The point is - paano kung nag investigate kayo at mali 'yung sinasabi niya ? You allowed your institution to be used," he said.

PNP chief Oscar Albayalde earlier said the police did not coach Advincula, adding that it is up to the latter to prove his allegations.

"Let him prove his statement... Hindi po kami ang nagsabi nun -- s'ya (we didn't say that, he did)," Albayalde told reporters.

Alejano said he was surprised by Advincula's claims, saying he had never met the man. He rejected Advincula's claims that he met all but one of the Otso Diretso candidates, saying the opposition slate had a hard time getting everyone together during the campaign.

"Nagulat ako kasi complete turnaround and ridiculous ang claims. I have not met him, hindi ko siya kilala at walang communications whatsoever," he said.

He also sees one possible reason why Advincula came out with his claims.

"They are trying to discredit the opposition. Assuming the elections were clean, talo na nga 'yung opposition tapos didiinan mo pa. Ano ang objective mo? To silence the opposition from raising important national issues," he said.