Brazil has some of the most violent and overcrowded jails in the world.
But now, it is trying to reform its crumbling prison system by using public-private partnerships.
In this last of a three-part series, Al Jazeera travelled to Minas Gerais to visit a privately-run prison with the highest standards in the country.
Al Jazeera's Lucia Newman reports from Minas Gerais.
[A warning: viewers may find some of the pictures in this report disturbing.]