New York City Police Department
How cop cams can help ordinary citizens
How cop cams can help ordinary citizens

When Amarildo de Souza, an unemployed bricklayer who lived in Rio de Janeiro's largest favela, left home one evening last July, his intention was simply to pick up a few things at the market. Instead, he was caught up in a drug sweep and taken to the neighborhood police headquarters. A security camera recorded De Souza's entry to the station, but he never returned home. For the next two months, his family and friends were left to wonder what had happened — though they had a good idea. Disappearances and deaths at the hands of the police in Brazil are not unusual. About 35,000 Brazilians have disappeared without a trace since 2007, and Brazilian police are responsible for about 2,000...