Brazilian Vigilantes Used WhatsApp to Warn People of a Coming Massacre

Following a police shooting in northern Brazil, people started getting messages. On WhatsApp, they were warned to stay indoors that night. Some of the WhatsApp messages were texts, though the most popular was an audio file with a dire warning: "Don't go to Guama, Canudos or Terra Firme tonight. It concerns your… » 11/11/14 9:52am 11/11/14 9:52am