Lockdown: Inside Brazil's Most Dangerous Prison

The Carandiru House of Detention, in the teeming city of São Paulo, was the largest and most crowded prison in Latin America. Known as the 'Old House', it was also highly unusual in the way it was governed. Closed to the outside world, and even largely to the wardens, it was run almost entirely by the inmates themselves, who created a unique society complete with politics, hierarchies and a system of justice.

In 1989, at the height of the AIDS epidemic in Brazil, with only a handful of phys...