In this July 7, 2016 photo, police exchange gunfire with drug traffickers at the “pacified” Alemao slum complex in Rio de Janeiro, Brazil. Half a dozen officers had entrenched themselves behind a cable car station while they shot it out with suspected drug traffickers in the sprawling cluster of slums in north Rio. Shootouts erupt daily, even in slums where community policing programs had successfully rewritten the narrative in recent years. (Photo by Felipe Dana/AP Photo)





In this July 16, 2016 photo, Pastor Nilton, back right in blue, rejoices with members of his church after learning that residents will allow him to hold a prayer service in their courtyard, in a gang-ruled slum in Rio de Janeiro, Brazil. Pastor Nilton, a former drug trafficker, spends his energy looking to convert the teenage boys who serve as security guards, lookouts and distributors for the drug lords operating in the slums. (Photo by Felipe Dana/AP Photo)





In this July 11, 2016 photo, a young, masked drug trafficker poses for photos holding his guns at a slum in Rio de Janeiro, Brazil. Teenagers openly tote guns while they work as guards, lookouts and distributors for drug lords operating just a few miles from where hundreds of thousands and tourists and athletes will be for the Aug. 5-21 Olympic Games. (Photo by Felipe Dana/AP Photo)





In this July 15, 2016 photo, residents watch as police work the crime scene where a man was murdered in Mage, greater Rio de Janeiro, Brazil. Scenes of impunity and violence play out daily in many of Rio's hundreds of slums, known here as favelas, and other outlying areas. The vast majority of killings are the result of heavily armed gangs who frequently shoot it out in turf wars. (Photo by Felipe Dana/AP Photo)





In this July 11, 2016 photo, young drug traffickers pose for photos holding their guns at a slum in Rio de Janeiro, Brazil. Teenage boys openly tote guns as they run in flip-flops through a maze of alleys. When Associated Press journalists visit areas with authorization from the gangs, the ones who agree to be photographed cover their faces so they can't be identified. (Photo by Felipe Dana/AP Photo)





In this July 7, 2016 photo, a police officer walks past residents during a clash with drug traffickers in the “pacified” Alemao slum complex in Rio de Janeiro, Brazil. Tourists coming for the Olympic Games will likely be spared from the violence lived daily in slums in the west, north and outlying areas of the city. The 85,000 soldiers and police who will be dispatched represent a force double that of the 2012 Games in London. (Photo by Felipe Dana/AP Photo)





This July 13, 2016 photo shows a crime scene at the entrance of a home in Nova Iguacu, greater Rio de Janeiro, Brazil. The man who lived there with his family was removed by gunmen and killed on the spot. Police believe the killing was a gang hit related to a change of leadership in the area. On the eve of hosting the world's largest sporting event, Rio's decade-long push to curb violence in hundreds of slums appears to be crumbling. Overall murders are on the rise in the first half of 2016. (Photo by Felipe Dana/AP Photo)





In this July 19, 2016 photo, cable cars transport commuters over the Complexo do Alemao, a sprawling cluster of slums in north Rio de Janeiro, Brazil. Just a short drive from upscale Rio districts like Ipanema and Copacabana, steep and narrow entryways lead to slums where poverty and gun violence dominate daily life for hundreds of thousands of residents. (Photo by Felipe Dana/AP Photo)





In this June 29, 2016 photo, a police officer patrols among residents during an operation against drug traffickers at the “pacified” Jacarezinho slum in Rio de Janeiro, Brazil. The Pacification Police Units, known by the Portuguese acronym UPP, were created in 2008, setting up community stations in at-risk areas, mostly near sports venues, posh tourist districts and downtown. A drug gang leader called the program a “facade”. He said that drug dealers were initially worried and kept a low profile, but soon it was back to business as usual. (Photo by Felipe Dana/AP Photo)





In this July 13, 2016 photo, an eyewitness stands with a woman outside a bar where a pre-candidate for local council was shot dead in Mage, in greater Rio de Janeiro, Brazil. According to local news reports the 49-year-old woman was shot by four gunmen while in a bar with a friend and her partner. The woman is the 11th politician murdered in the greater Rio area since November, and police have not been able to determine the motives for the killings. (Photo by Felipe Dana/AP Photo)





In this July 16, 2016 photo, pastor Nilton blesses two young drug traffickers at a slum in Rio de Janeiro, Brazil. Many of the young drug traffickers have an immense respect for the pastor, a former drug trafficker. It's not uncommon to see young men set their weapons down, but only long enough to receive his blessing. (Photo by Felipe Dana/AP Photo)





In this July 13, 2016 photo, a police officer photographs the body of homicide victim Aga Lopes Pinheiro, a pre-candidate for local council in Mage, in greater Rio de Janeiro, Brazil. (Photo by Felipe Dana/AP Photo)





This June 30, 2016 photo shows the body of a teenage boy who was killed while walking outside of his home turf in a gang controlled area of Rio de Janeiro, Brazil. Later in the day, according to residents, the father went to denounce his son's death to the gang and was shot dead. Overall murders are on the rise in the first half of 2016 say officials, and the victims are overwhelmingly young, black men. (Photo by Felipe Dana/AP Photo)





In this July 7, 2016 photo, a police officer runs for cover during an exchange of gunfire with drug traffickers at the “pacified” Alemao slum complex in Rio de Janeiro, Brazil. Half a dozen officers had entrenched themselves behind a cable car station while they shot it out with suspected drug traffickers in the sprawling cluster of slums in north Rio. Shootouts erupt daily, even in slums where community policing programs had successfully rewritten the narrative in recent years. (Photo by Felipe Dana/AP Photo)





In this July 6, 2016 photo, a drug gang leader poses for a photo in a slum in Rio de Janeiro, Brazil. He told Associated Press journalists that drug dealers win the hearts and minds of locals by paying for food and medicine, providing a lifeline for many living in crushing poverty. Law enforcement experts say Brazil's worst recession since the 1930s is at the heart of the surge in violence with overall murders are on the rise. (Photo by Felipe Dana/AP Photo)