A federal jury in Boston on Monday convicted the sister of Beatrice Munyenyezi, of visa fraud, fraud in immigration documents, and perjury.Prudence Kantengwa, 47, who was born in Rwanda and entered the United States in 2004, was convicted of visa fraud, fraud in immigration documents, perjury during her testimony before an immigration judge and obstruction of administrative hearings.The Boston resident, was found guilty of lying about her activities and associations during the Genocide against the Tutsi, to enter the country and when seeking asylum. She will be sentenced July 3. Munyenyezi, 42, a Rwandan living in New Hampshire, formerly of Manchester, stood trial this spring in U.S. District Court in Concord, on two counts of lying on immigration and naturalization papers about her role in the Genocide. Federal prosecutors claimed Munyenyezi commanded an extremist Hutu militia and ordered the rapes and killings of Tutsi in Butare in 1994.A federal jury failed to reach a verdict in Munyenyezi’s case on March 15 after four days of deliberation. She will go on trial for a second time Sept. 10.