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FILE - AUGUST 4, 2015: With one year to go before the start of the 2016 Summer Olympics, host city Rio de Janeiro continues to prepare. RIO DE JANEIRO, BRAZIL - JULY 21: Aerial view of Marina da Gloria, the Sugar Loaf and Guanabara Bay with nearly one year to go to the Rio 2016 Olympic Games on July 21, 2015 in Rio de Janeiro, Brazil. Marina da Gloria will host the sailing competition during the Rio 2016 Olympic Games. (Photo by Matthew Stockman/Getty Images)
FILE - AUGUST 4, 2015: With one year to go before the start of the 2016 Summer Olympics, host city Rio de Janeiro continues to prepare. RIO DE JANEIRO, BRAZIL - JULY 21: Aerial view of Marina da Gloria, the Sugar Loaf and Guanabara Bay with nearly one year to go to the Rio 2016 Olympic Games on July 21, 2015 in Rio de Janeiro, Brazil. Marina da Gloria will host the sailing competition during the Rio 2016 Olympic Games. (Photo by Matthew Stockman/Getty Images)

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    Amnesty International slams Brazilian police

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Amnesty International slams Brazilian police

Amnesty International says Rio de Janeiro police are responsible for many unwarranted killings, but local authorities say the report is "reckless and unfair." CNN's Shasta Darlington reports.

Amnesty International slams Brazilian police

Amnesty International says Rio de Janeiro police are responsible for many unwarranted killings, but local authorities say the report is "reckless and unfair." CNN's Shasta Darlington reports.