Since 2006, more than 50 journalists have been killed or gone missing in Mexico. That's the same year former President Felipe Calderon went on the offensive against drug cartels

Stories about the drug war sell papers in Mexico, but reporting on it can be life threatening. Despite the danger, one Tijuana newspaper, Semanario Zeta, continues publishing investigative stories about the cartels

Filmmaker Bernardo Ruiz profiles the paper in his new documentary, "Reportero."

RELATED: Documentary 'Reportero' looks at Tijuana journo who risks his life to report on crime