A year before shutting down the Carandiru House of Detention in São Paulo, the largest in Latin America at that time, some prisoners learned to use video cameras. For seven months, they documented their daily lives behind bars, marked by overcrowded cells, drug dealing, prayers, fights and solitude.源自:http://etudoverdade.com.br/en/filme/51590-O-Prisioneiro-da-Grade-de-Ferro-Auto-Retratos