Alieu Kosiah, 46, had faced 25 charges including killings of civilians, rape, recruiting a child soldier and an act of cannibalism.
Court documents showed Kosiah was convicted on all but four of them, with acquittals for attempted murder of a civilian, accessory to the murder of a civilian, an order to loot and recruitment of a child soldier.
Kosiah was arrested in 2014 in Switzerland, where he had been living as a permanent resident. A 2011 Swiss law allows prosecution for serious crimes committed anywhere, under the principle of universal jurisdiction.
He had denied all the charges and told the Federal Criminal Court he was a minor when first recruited into the conflict.
The court said in an emailed statement that the 20-year sentence was the maximum it was allowed to give under Swiss law.
“No mitigating circumstances were taken into account in the sentencing. A deportation from Switzerland was also ordered for a period of 15 years,” it said. Kosiah was also ordered to pay compensation to seven plaintiffs, it added.
Human Rights Watch called Friday’s sentencing a “landmark”.
“Switzerland’s efforts on this case should help mobilise wider accountability in Liberia as this shows that these crimes can be prosecuted. I see this as an opportunity,” the group’s Elise Keppler said.
Anonymous witnesses
About 15 Liberians had been due to testify against Kosiah, including one whose brother was allegedly beaten to death with batons by rebels under Kosiah’s command. Another alleged he had been forced to serve as a child soldier for Kosiah.
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Victims to testify in Swiss war crimes trial of Liberian rebel commander
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The trial in Switzerland of a Liberian rebel commander facing allegations of rape, executions and cannibalism has resumed.
Lawyers for the victims requested that they remain anonymous to prevent retaliation in Liberia.
Liberia has not prosecuted war criminals from its 1989-2003 conflict in which hundreds of thousands of people died. Only a handful of Liberian war criminals have been tried in international courts. They include former president Charles Taylor, who was convicted by a UN court for war crimes in neighbouring Sierra Leone and is now jailed in Britain.
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What can the Swiss learn from the Finns on judging Liberian war crimes?
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Historic war crimes trials for Liberia are under way in Switzerland and Finland. But the two approaches are rather different.
Swiss price watchdog slams excessive prices for generic medicines
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The cheapest generic medicines available in Switzerland are more than twice as expensive as in other countries, according to a study by the Swiss price watchdog.
Nature should not figure in net zero calculations: academic study
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The natural removal of CO2 from the atmosphere by forests or oceans should not be included in the net-zero balance of climate protection measures, argue researchers.
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None of the 15 major Swiss retail banks is meeting international climate and biodiversity targets, according to a ranking by WWF Switzerland.
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Nestlé's new CEO Laurent Freixe, has presented plans for the future of the world's largest food company, after his first few weeks in office.
Swiss foreign minister calls on Moscow to end Ukraine war
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It's high time Moscow ended its war against Ukraine, Swiss foreign minister Ignazio Cassis tells the UN Security Council.
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The only alternative to the UN Palestinian agency’s work in Gaza is to allow Israel to run services there, Philippe Lazzarini, UNRWA Commissioner-General, told reporters in Geneva on Monday.
Study reveals food culture differences between Switzerland and neighbours
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Three-quarters of Swiss people consider eating to be a pleasurable, social activity, a new survey reveals. Healthy eating, however, plays a much less important role, it found.
If you want to start a conversation about a topic raised in this article or want to report factual errors, email us at english@swissinfo.ch.
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Hopes rising that war criminals will be brought to court
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Countries including Switzerland are increasingly using “universal jurisdiction” to prosecute war criminals, says a new report.
Why Switzerland’s war crimes office is dragging its feet
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After seven years, Switzerland’s war crimes office still has not completed any cases, while two people wait in detention. What’s behind the inaction?
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