• Switzerland’s top criminal court convicted former Gambian Interior Minister Ousman Sonko of crimes against humanity.
• Sonko has been sentenced to 20 years in prison for his role in repression under ex-dictator Yahya Jammeh.
• Sonko, who served from 2006 to 2016, faced charges including homicide, torture and false imprisonment.

Switzerland’s top criminal court on Wednesday convicted a former interior minister of Gambia for crimes against humanity and sentenced him to 20 years over his role in repression committed by the west African country’s security forces under its longtime dictator, a legal advocacy group said.

Prosecutors had been seeking a life sentence for Ousman Sonko, Gambia’s interior minister from 2006 to 2016 under then-President Yahya Jammeh, TRIAL International said.

The Federal Criminal Court in the southern town of Bellinzona ruled that Sonko’s crimes — including homicide, torture and false imprisonment — amounted to crimes against humanity. However, they did not rise to “aggravated” cases that could have brought the maximum penalty of life behind bars, according to several lawyers who attended the trial.

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The trial, which began in January, was hailed by advocacy groups as a watershed application of the principle of “universal jurisdiction,” which allows for the prosecution of serious crimes committed abroad.

Activists and legal experts say the verdict could send a message to Jammeh, who fled Gambia and remains in exile in Equatorial Guinea.

Sonko, who was in the courtroom for Wednesday’s reading of the verdict, offered little reaction when a translation was read out in English, said TRIAL International’s legal adviser Benoit Meystre, who also attended the proceedings.

Sonko applied for asylum in Switzerland in November 2016 and was arrested two months later. The Swiss attorney general’s office said his indictment, filed a year ago, covered alleged crimes during 16 years under Jammeh, whose rule was marked by arbitrary detention, sexual abuse and extrajudicial killings.

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Sonko was accused of supporting, participating in and failing to stop attacks against opponents in Gambia, an English-speaking West African country surrounded by neighboring Senegal. The crimes included killings, torture, rape and numerous unlawful detentions, prosecutors said.

“This unprecedented conviction based on universal jurisdiction in Europe is the confirmation that no one is above the reach of justice,” Meystre said in a text message. “Even the most powerful figures can be brought to account for their participation in mass atrocities.”

Madi MK Ceesay, an award-winning journalist who was once arrested under Sonko’s orders and who testified in the trial, told The Associated Press the proceedings showed that “no matter what, the long arm of justice can always catch the perpetrator.”

Reed Brody, an American human rights lawyer who attended the trial, said Sonko’s conviction was a pivotal step toward justice for Jammeh’s victims.

“The long arm of the law is catching up with Yahya Jammeh’s accomplices all around the world, and hopefully will soon catch up with Jammeh himself,” he said.

Sonko was convicted of homicide, torture and false imprisonment as crimes against humanity, while rape charges against him were dropped, Brody wrote on X.

Outside the courtroom, Olimatou Sonko, the defendant’s daughter, told Swiss public broadcaster SRF “it isn’t fair” that the full proceedings of the trial weren’t translated to English from German, which her father doesn’t understand.

Philip Grant, executive director at TRIAL International, which filed the Swiss case against Ousman Sonko before his arrest, said he was the highest-level former official ever to be put on trial in Europe under the principle of universal jurisdiction.

Sonko, who joined the Gambian military in 1988, was appointed commander of the State Guard in 2003, a position in which he was responsible for Jammeh’s security, Swiss prosecutors said. He was made inspector general of the Gambian police in 2005.

He was removed as interior minister in September 2016, a few months before the end of Jammeh’s government, and left Gambia to seek asylum in Europe.

Ousman Sonko is not to be confused with leading politician Ousmane Sonko in Senegal, who spells his first name slightly differently.

Jammeh seized control in a 1994 coup. He lost Gambia’s 2016 presidential election but refused to concede defeat to Adama Barrow, and ultimately fled amid threats of a regional military intervention to force him from power.

“The verdict against Ousman Sonko is a milestone in the fight against impunity and a historic success for universal jurisdiction in Switzerland and Europe,” Amnesty Switzerland wrote on X. “Even former ministers can be prosecuted! Victims and their families finally see justice.”