Antwerp, Belgium

WHEN Paul Kagame led Rwandan rebel forces to victory in 1994, he was praised not only for halting a genocide that had killed half a million people, but also for advocating reconciliation rather than revenge. After he became president in 2000, he was acclaimed as a democratic visionary. Under his leadership, Rwanda is attracting investment, fighting corruption and improving health and education.

But a shadow hangs over Mr. Kagame’s Rwanda, in the form of persistent concern about intimidation of the political opposition. Outspoken journalists and politicians have disappeared or died in mysterious circumstances, while the government insists that some thoughts are too dangerous to permit, in the aftermath of genocide.

This week, a court in the capital, Kigali, postponed — for the third time — a verdict in the trial of the opposition leader Victoire Ingabire. Also this week, a panel of United Nations experts found that top Rwandan military officers had helped organize, finance and arm mutinous rebels across the border, in the Democratic Republic of Congo.

Ms. Ingabire, who had lived outside the country since before the genocide and is a member of the Hutu majority, stirred immediate controversy when she returned in 2010 and spoke openly about ethnic politics — a taboo subject since the genocide. She was blocked from running for president. Several weeks after the election, which Mr. Kagame won with 93 percent of the vote, she was arrested for violating a 2008 law that prohibits “genocide ideology.” Ms. Ingabire had suggested that innocent majority Hutus who died during the genocide deserved to be mourned alongside the minority Tutsis who were massacred by Hutu militias. She has said her goal was reconciliation, not historical revisionism.