 In "Proceso", Martínez Pérez was an open critic of government corruption and abuse of authority, and wrote extensively on the local drug trade and organized crime.She was particularly known in Mexico for her in-depth reporting on the Mexican drug cartels and how they corrupted government officials in Veracruz.Among her last publications before her murder was a political profile about Reynaldo Escobar Pérez and Alejandro Montano, two politicians of the Institutional Revolutionary Party (PRI) who were running for office in Congress.