Kabera, 50, fled Rwanda after being accused of sexual assault, a charge he denied, and sought asylum in Uganda citing political persecution. Ugandan police spokesperson Kituuma Rusoke confirmed that Kabera's head had still not been recovered and that his body was discovered by local residents over the weekend.
Kabera built a public profile as a musician and YouTuber, attracting more than 144,000 subscribers to his channel, which featured over 800 videos, many criticising Kagame and his administration. According to his family, Kabera had travelled to inspect a construction site about 45 km (30 miles) outside Kampala before his death.
His widow, Jeanne d'Arc Rwigema Uwizeye, told BBC Great Lakes in a written message that she now feared for her family's safety. "It is scary. I feel crazy, the children and I don't have security," she said.
Reacting to news of his murder, exiled opposition group Rwanda National Congress (RNC) called for a thorough investigation and for those responsible to be brought to justice. In a statement on X, the RNC said: "Today, his family is grieving, his voice is gone, and Rwandans in exile are confronting a terrifying question: where can we be safe?"
Kabera's death adds to concerns about the safety of Rwandan dissidents living in exile. In 2014, Patrick Karegeya, a former Rwandan intelligence chief who helped set up the RNC, was found dead in his hotel room in Johannesburg, South Africa. Karegeya had fallen out with Kagame and became a vocal critic after fleeing to South Africa. Following his death, Kagame made remarks widely seen as a warning to other critics, saying: "Any person alive who may be plotting against Rwanda, whoever they are, will pay the price. Whoever it is, it is a matter of time."
Several critics of Kagame have been killed, both in Rwanda and abroad. South African authorities issued arrest warrants for two Rwandans accused of murdering Karegeya in 2019.