She has investigated issues related to human rights, gender violence, terrorist activity, and organized crime in Mexico, in the United States, and in Europe.

[2] In 2006, Martínez received death threats after publishing her book El manto púrpura which focuses on a boy who was allegedly sexually abused by Mexican priest Nicolás Aguilar.

Presenter Reha Kansara interviewed former and current employees about systematic attacks against them, apparently ordered from upper management and designed to discredit and humiliate those who did not obey Sanjuana Martinez.

The report uses information from Article 19, Signa Lab, and Aristegui Noticias showing that Sanjuana Martínez directed attacks against these journalists in a WhatsApp chat group called "Avengers".

Signa Lab also analyzed coordinated Twitter accounts attacks on journalists who questioned Mexican president Andres Manuel López Obrador in his daily press conferences.