By April 12, 1994, six days after the genocide against Tutsis by an extremist Hutu regime began, militia surrounded the church. Soon afterward Bosco saw local police inspector Fulgence Kayishema in a meeting with the parish priest and others.
"We thought the meeting... was addressing how to maintain our security," Bosco told Reuters. "It later came to our knowledge that they had cruel intentions to exterminate us."
Hutu militia lobbed grenades at the Nyange Catholic Church in Kibuye Prefecture, then doused it with fuel to set it ablaze. When that failed, they knocked down the church with bulldozers and most of those sheltering inside died.
On Wednesday, after 21 years on the run from his genocide indictment over the church massacre by the international Rwanda war crimes tribunal, Kayishema was arrested in South Africa, giving the survivors a long-denied sense of satisfaction.
"The arrest of Kayishema was eagerly awaited. May justice prevail," said Bosco, now 67, who survived the bulldozing by hiding under some of the bodies of the 2,000 victims.
He had been Kayishema's neighbor before the 1994 genocide, and spoke to Reuters by his front door while gazing pensively at Kayishema's old plot of land.
Another neighbor, Aloys Rwamasirabo, lost five of his nine children at the church. The rest were killed elsewhere by Hutu militia.
"We just thank God and the government that he was caught," said Rwamasirabo, who helped build a memorial at the site of the church. "We want him (Kayishema) to come and see how the place looks now despite what he has done to it."
Tribunal prosecutors said Kayishema helped plan the church slaughter, obtained materials to help carry out the killings and supervised the dumping of corpses into mass graves.
Neither Kayishema, who appeared briefly in a South African court on Friday and was remanded in custody, nor his lawyers have commented on his arrest and the charges against him.
The parish priest, a Hutu, was convicted as an accomplice by the Rwanda tribunal in 2007 and is serving a life prison term.
An estimated 800,000 ethnic Tutsis and Hutu moderates were killed during Rwanda's genocide, orchestrated by an extremist Hutu regime and meticulously executed by local officials and ordinary citizens.
Kayishema's arrest means there are now only three fugitives indicted by the tribunal whose whereabouts remain unknown, though Rwanda considers that a greater number of genocide perpetrators have yet to be caught.
"His arrest ensures that he will finally face justice for his alleged crimes," said Serge Brammertz, prosecutor of the International Residual Mechanism for Criminal Tribunals, which took over from the Rwanda tribunal when it was wound up in 2008.
Forum