A former military prosecutor in the Democratic Republic of Congo has been sentenced to death by a military court.
Alamba was involved in the trial of President Laurent Kabila's killers
Along with 10 others, Colonel Charles Alamba was found guilty of the murder last year of a government official.
He was also found guilty of masterminding a gang of soldiers and policemen which carried out a campaign of killing and extortion.
A BBC correspondent in the capital, Kinshasa, says Alamba had a fearful reputation while chief prosecutor.
According to the BBC's Emery Makumeno Agalo, from his appointment in 1999 until the death of President Laurent Kabila in January 2001, Alamba would conduct trials during the night. By dawn he had the guilty executed.
Under the presidency of Joseph Kabila, who succeeded his father, Alamba kept his job, but the number of prosecutions and executions fell.
Alamba was led away from the courtroom with his hands manacled and his head bowed in shame, along with 10 other members of his criminal gang.
Steve Nyembo, a senior official with the tax collection agency, was shot dead by a gang who broke into his house. After mutilating and burning his corpse, they set fire to his villa, the court found.
The colonel was found guilty of providing a vehicle for the gang and paying them $3,000 to carry out the killing.
After the seven-month trial, the judge said Alamba had masterminded the activities of his gang.
Alamba and the other military personnel are not able to appeal against the verdicts, reports the AFP news agency.
He was a senior figure involved in the trial of those suspected of murdering President Laurent Kabila three years ago.
Human rights groups criticised those proceedings, which resulted in 30 death sentences being handed down.