Dedicated to reporting on the local drug trade and drug-related murders, Marcos García received death threats from organized crime.

Roberto Marcos García worked as a deputy editor for Testimonio for at least 13 years, and wrote about politics, drug-related killings, police reports, and the narcotics trade in the state of Veracruz.

[6] On 21 November 2006, Marcos García (aged 50) was traveling from the state capital to Alvarado, Veracruz when a stolen vehicle with license plates from Mexico City ran him down around noon.

According to the local press, Cortés Terrones reportedly threatened the journalist and warned him that two men wanted to abduct him for writing about their criminal activities two weeks before his killing.

[4][10] Nonetheless, the Attorney General Office of the State (PGJE) released Cortés Terrones and Muñoz López in December 2007 from prison due to "lack of evidence" against them.