Prosecution: Rwandan’s ‘business’ was assassination

But Rwandans in exile have accused Mr. Kagame of using his agents to hunt down his external foes.

Gen. Nyamwasa and dissident leaders accuse Mr. Kagame of crushing opponents and trampling on democracy after helping to end the genocide that left 500,000 people dead in 1994.

Mr. Kagame was re-elected in 2010, months after Gen. Nyamwasa was shot.

Last year, Gen. Nyamwasa was among four former Kagame aides in exile in South Africa and the United States who were convicted in their absence by a Rwandan military court for disturbing public order, sectarianism, criminal conspiracy and threatening state security.

South African prosecutors have said key witnesses in the politically and diplomatically sensitive trial have sought police protection in South Africa because they fear Rwanda’s government.

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