An Ohio man has been arrested for allegedly concealing his participation in the Rwandan genocide almost three decades ago.

Eric Tabaro Nshimiye, also known as Eric Tabaro Nshimiyimana, a 52-year-old living in Uniontown, Ohio, was arrested Thursday by special agents from Homeland Security Investigations, according to a news release from the agency.

He faces charges of falsifying, concealing and covering up a material fact by trick, scheme or device, obstruction of justice and perjury, according to HSI.

Nshimiye allegedly participated in the killing of Tutsi men, women and children in Rwanda by hitting them on the head with a nail-studded club and then hacking them to death with a machete, the HSI release says. Specific examples of his crimes include killing a 14-year-old boy and “aiding and abetting” in the rape of Tutsi women, according to the release.

The Rwandan genocide broke out in 1994 and resulted in the deaths of roughly 800,000 people, most of them members of the Tutsi ethnic minority, who had been given higher social standing by the Belgian colonial regime. Over a 100-day spree, soldiers, police, militia and armed civilians from the Hutu ethnic majority killed Tutsis en masse, encouraged by local officials and government-sponsored radio demanding civilians attack, rape, rob and kill their Tutsi neighbors.

“Nshimiye is accused of lying to conceal his participation in one of the greatest human tragedies of all time,” Michael J. Krol, a HSI agent, said in the news release.