Wichita ? A Rwandan farmer showed jurors the scar left on his leg by a Kansas resident he alleges threatened to kill him if he did not kill ethnic Tutsis during the African nation’s 1994 genocide.

Emmanuel Nzabandora testified Wednesday in the trial of 84-year-old Lazare Kobagaya, of Topeka, on charges of lying to U.S. immigration officials about his involvement in the ethnic slaughter.

Nzabandora testified two other men had beaten him because he refused to kill. He said Kobagaya then stabbed him knife concealed in a cane. He says he later clubbed a Tutsi man to death while Kobagaya and others watched.

He also alleged Kobagaya had earlier offered a man beer to kill a Hutu who refused to his Tutsi relatives’ homes. He said that man immediately killed the Hutu.