Moise Katumbi, the chairman of Congo's premier football team and a presidential candidate, has not set foot in the country for a year.
Etienne Tshisekedi was the man with the experience to lead Congo to elections in 2017. After his death, they are in doubt.
The majority want him to leave when his term ends in December, but he says elections will be delayed until 2018.
Kabila has been accused of trying to stay in power by delaying elections in Congo.
Elections scheduled for November look likely to be delayed until at least July 2017.
The judge claims the government wants to cripple Katumbi's political ambitions.
The 83-year-old politician has opposed successive governments and says he'll run again in 2016.
Darryl Lewis worked for opposition presidential candidate Moise Katumbi, a challenger to President Joseph Kabila.
Elections are scheduled for November in the conflict-torn, mineral-rich African country.
Congo could go the way of Burundi in President Kabila tries to stay in power, according to one analyst.
The football club owner and presidential candidate has been accused of recruiting mercenaries.
Katumbi, the owner of a football club, announced he would run for the Congolese presidency last week.