The Facebook page of ICC Pre-Trial Chamber-I Presiding Judge Iulia Motoc with comments from pro-Duterte supporters. ABS-CBN News

MANILA — Detained former President Rodrigo Duterte could face more legal difficulties after his supporters spammed the social media page of an International Criminal Court judge, Kristina Conti of the National Union of Peoples' Lawyers warned Tuesday.

The Facebook page of ICC Pre-Trial Chamber-I Presiding Judge Iulia Motoc has been littered with comments from users who appeared to be supportive of the former president, with some urging the international tribunal to return Duterte to the Philippines.

Duterte is detained at the ICC detention facility in Scheveningen in the Netherlands to face crime against humanity charges for his deadly war on drugs. 

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Some social media users commented on Motoc's page to call for a "fair judgement" for Duterte, while others accused her of bringing "chaos" to the Philippines, which recently saw protests attended by Duterte supporters. 

"Nakasasama. Hindi [nila] napapalaya si Duterte kaya siguro pagnilayan nila kung ano'ng gagawin," said Conti, who is also an assistant to counsel of the ICC.

"Because the proper way would be to perhaps write to the court and ask for the opportunity to be heard, not spam the social media. That's not an official communication channel of the court," she added. 

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As of Tuesday, Motoc's social media page has limited who can comment on her posts.

Conti noted that Article 70 of the Rome Statute that created the ICC "talks about offenses against the administration of justice."

"If you intimidate an official of the court for the purpose of... forcing or persuading the official not to perform or to perform improperly his or her duties, Duterte could have additional charges if these attacks could be traced back to him," she said.

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Spamming the ICC presiding judge's social media page also weighs against the grant of a possible interim release of Duterte, added Conti.

The Duterte camp has yet to issue a statement on the Duterte supporters' behavior on the social media page of Motoc.

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Meanwhile, a mother of a drug war victim during a press conference organized by the International Coalition for Human Rights in the Philippines decried Tuesday the supposed social media attacks from the former president's supporters. 

"Lori," whose son was killed during the drug war, said the harassment was "traumatic," adding she fears for her safety because she said some social media users knew where she lived. 

"Kahit mabigat sa pakiramdam patuloy ako sa laban… Kung hindi ako lalaban, sino pa? Talo ako. Talo kami. Biglang pumasok sa isip ko na biktima na nga kami, binibiktima pa kami muli. Ang pronouncement ni Duterte siya ang biktima pero ang totoong biktima, kaming mga pamilya ng pinaslang," said Lori.

More than 6,000 suspected drug personalities were killed during Duterte's drug war, according to official figures. But human rights groups estimate that the toll could be as high as 30,000.

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— With a report from Job Manahan, ABS-CBN News