Ladislas Ntaganzwa – who was arrested in the Democratic Republic of Congo five years ago – was found guilty of personally leading a series of massacres of Tutsi civilians, including an attack on a church where thousands had taken shelter.
The former mayor of southern Nyakizu was also accused of orchestrating the rape of many women.
ALSO READ : Chief of Africa Union frowns on Minneapolis ‘murder’
Earlier this month, investigators tracking genocide suspects had a major breakthrough when the alleged financier of the genocide, Félicien Kabuga, was arrested in France.
He is due to be tried at a tribunal in Tanzania.
ALSO READ : 19 requests to government for consideration by GNAT
It emerged last week that another top suspect, former Defence Minister Augustin Bizimana, had actually been dead for several years.