Photojournalists place their cameras on the floor during a demonstration condemning the alleged murder of fellow journalist Regina Martinez in Mexico City, Sunday April 29, 2012. The Mexican government’s human rights commission said Sunday that it will investigate the apparent slaying of a correspondent for Proceso newsmagazine who often wrote about drug trafficking. Police found the body of Martinez on Saturday inside the bathroom of her home in the Veracruz state capital, Xalapa. (AP Photo/Marco Ugarte)