Image copyright G Image caption Vital Kamerhe is accused of embezzling more than $50 million (£39 million) of public funds.
A judge who was said to have died of a heart attack while overseeing a corruption trial involving the president's chief of staff in the Democratic Republic of Congo actually died of stab wounds to the head, the justice minister has revealed.
Celestin Tunda Ya Kasende said a murder investigation had now been launched.
In May, police said Judge Raphael Yanyi had died of a heart attack.
Mr Kamerhe, once a key member of President Felix Tshisekedi's government, is accused of embezzling more than $50m (£39m) of public funds.
His supporters believe the trial is politically motivated - aimed at stopping him from running for president in the future.
The trial continued with a replacement judge after Yanyi's death. »