The 57-year-old director of the El Politico magazine and columnist for El Sol de Córdoba and el Diario de Xalapa was shot dead in the Mexican state of Veracruz while he was with his family.
Monlui served as President of the Association of Journalists and Photographers de Córdoba and was the leader of a national union for sugar cane farmers, whose members have been victims of attacks in recent years.