Abbas Kayonga was in charge of fighting fraud in the country's eastern mines but was dismissed last year for negligence.

Attempts by Congolese troops to arrest him resulted in the deaths of six people, before UN peacekeepers succeeded in detaining him in November.

Mr Kayonga has been charged with murder and inciting rebellion and was sentenced to death - a punishment that is automatically commuted to life in prison.

Thirteen other people received a similar sentence.

The court has prevented Mr Kayonga from appealing its decision.

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Abbas Kayonga (not pictured) was in charge of investigating corruption in the country's mines