Jose Inacio Rene, the police officer identified as Machado's killer, had not been tried by year's end.
The government made some progress prosecuting police officers responsible for human rights violations.
However, impunity remained a problem, and the results of investigations into security force abuses were seldom released.
No investigation had taken place by year's end.
In September 2009 members of the Armed Forces of Angola (FAA) buried alive 45 persons in a tunnel in Lunda Norte after determining they were illegal diamond miners.
In 2008 there were multiple media reports in Luanda that police deliberately targeted and killed persons suspected of gang-related violence and other criminal activity.