we're attacked, tortured, kidnapped,d, murdere >>afael pineneda's work makeks him a ththorn in the side e of mexico's drug kingpins and corrupt politicians. that puts his life in dangere. rafael: once, after a party, i got in the car. it was early in the morning, a grey day. and then i saw a message that had been left on the back of the car -- "keep quiet." i saw it in the rearview mirror. i was badly shaken. >> he defied the threat and carried on working.. pineda knows he can't expect any protection from the police or the courts. on the contrary -- rafael: if a journalist is found murdered, they're made out to be a criminal. no one bothers trying to investigate if the work they were doing might have had something to do with their death. >> pineda's fears are justified. miroslava breach was an investigative reporter shot dead in her car outside her home. she was setting off to take her son to school. the hit man who killed her was sent by a drugs cartel. why? to find out, we head to ciudad juarez on the u.s.-mexican border. it's home to powerful drug cartels and some of the worst violen