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Last Updated: Friday, 17 November 2006, 14:45 GMT
In pictures: Questions over Brazil violence

A man inspects the wreckage of a bus burned in Jardim Peri neighbourhood

Many buses were torched in May when the PCC organised crime network launched a devastating wave of attacks on Sao Paulo, Brazil's biggest city.

A bullet hole in the window of the Parada de Taipas police station

Police stations also came under attack and 32 officers were killed during several days of unrest.

Armed police officers in Sao Paulo

But the police hit back with lethal force of their own, killing 15 suspects a day at the height of the violence.

Armed police officer in Sao Paulo

Autopsy reports showed signs of summary execution in 60%-70% of fatal shootings by police, analysts say.

Photo of Rogerio do Carmo Pereira

Rogerio do Carmo Pereira, 24, was killed during a police raid on the Heliopolis favela.

Rogerio's widow holds his photo

Rogerio's widow says he was killed because he confessed to a previous arrest.

Photo of Ricardo Flauzino

Ricardo Flauzino, 22, was killed by masked men who local people believe were police officers.

Ricardo's mother holds his photo in front of a mural that reads "In homage to our friend Ricardo"

But in front of a mural depicting her son, Iracy Flauzino says witnesses are too frightened to go on the record.






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