During the time I lived in Mexico there were 10 journalists killed in the state of Veracruz where I lived. They were journalists that spoke out about government corruption or cartel violence.
During the same time the entire police force of Veracruz were fired in one day and the navy replaced them.
Currently there's blogo del narco, borderland beat and a few other places online to read uncensored stories, but almost all have the writer's name. Something like Wikileaks for safe, anonymous reporting would be great for these countries.