 Martínez Pérez worked for several newspapers in Chiapas, like El Sol de Chiapas and Número Uno, for five years before she returned to her home state of Veracruz, where she became the editorial assistant of the news channel Cuatro Más. The journalist then left to work for the daily Política, where she covered topics on security and social justice. Martínez Pérez was also a journalist and investigative crime reporter for the Diario de Xalapa newspaper. Her journalistic career in Veracruz, however, faced several challenges from the political elite; governors and government secretaries wanted to censor Martínez Pérez for criticizing their administration. Instead of self-censoring like other media outlets in the state, she became known for her direct reporting style, which frequently angered the authorities. She wrote over 63 reports covering political assassinations, natural disasters, authority abuses, human right violations, corruption, and government mismanagement.
