MANILA - Senatorial candidate Christopher "Bong" Go bared his back anew Monday to show he has no tattoo, debunking claims that he has ties to narcotics syndicates.

The senatorial aspirant took off his shirt at an event of the Luntian Party-list in Calamba City, Laguna, saying it is the last time that he would do such.

This, after a certain Peter Joemel Advincula surfaced Monday and claimed to be the hooded "Bikoy" figure in the controversial videos titled "Ang Totoong Narcolist."

The videos accused President Rodrigo Duterte’s son, former Davao City Vice Mayor Paolo Duterte, his son-in-law Atty. Manases Carpio, and Go of owning bank accounts where the alleged drug money went.

Go, a longtime aide of President Duterte, said Advincula should have himself checked at a mental hospital first instead of seeking legal help at the Integrated Bar of the Philippines.

"Alam niyo po, nagkamali si Bikoy ng kanyang pinuntahan. Hindi siya dapat pumunta sa IBP. Huwag kayong mag-alala. Proteksyunan naman kayo ng gobyerno. Pero dapat muna siya, sa tingin ko, dapat magpa-admit muna sya sa mental hospital. Dapat mauna muna siyang pumunta doon," he said.

(Bikoy made a mistake. He shouldn't have gone to the IBP. But don't worry, the government would protect him. I, however, think he should have been admitted to a mental hospital first.)

Go first bared his back during a campaign sortie in Agusan del Sur last month.

• Bong Go takes off shirt to prove he has no tattoo

Advincula earlier said he went public to seek legal aid and deny his alleged ties to the opposition senatorial slate Otso Diretso.

Go said the allegations linking him and the Duterte family to illegal drugs are "black propaganda" given that its only a few days before the midterm polls on May 13.

"Anyway, kung naniniwala po kayo kay Bikoy, alam niyo panahon ito ng politika eh. Kukulayan kami. Nadadamay lang ang pamilyang Duterte. Naidamay nila dahil sa mga akusasyon kay Pangulong Duterte. Marumi," he said.

(This is a time of political color. The Duterte family is only being dragged to dirty accusations.)

"Kinukulayan kami ng itim para sila ay pumuti. Black propaganda. Malicious. Panahon ng election. Kanya-kanyang siraan," he added.

(Dark allegations are hurled against us so that critics would appear to be cleaner. It's election time so black propaganda is everywhere.)

Advincula said he surfaced before the media due to a supposed threat on his life and because his conscience was nagging him over his role in the spread of drugs.

He added that he will cooperate with any Senate investigation into his allegations.

"Handa po ako na humarap sa ano mang imbestigasyon ng Senado upang patotohanan ang lahat ng inilabas ko sa video serye," said Advincula.

(I am ready to face any Senate inquiry to prove everything I claimed in the video series.)