A police officer stands guard after members of the press wrote messages on the street during a protest against the murder or disappearance of more than 140 journalists in Mexico since 2000, in front of the National Palace in Mexico City on June 1, 2018. The body of journalist Alejandro Márquez Jiménez was found on December 1, 2018, near Tepic, the capital of the northwestern state of Nayarit. (AFP/Yuri Cortez)
A police officer stands guard after members of the press wrote messages on the street during a protest against the murder or disappearance of more than 140 journalists in Mexico since 2000, in front of the National Palace in Mexico City on June 1, 2018. The body of journalist Alejandro Márquez Jiménez was found on December 1, 2018, near Tepic, the capital of the northwestern state of Nayarit. (AFP/Yuri Cortez)

Mexican journalist shot dead in Nayarit