Gustavo was a founding leader of the Guerrilla Army of the Poor – a rebel group that took up arms against the military dictatorship in Guatemala in the early 1980s; and he granted Pamela Yates permission to film with the rebels in the highlands in 1982 when she was making When the Mountains Tremble. Unlike many of his comrades, Gustavo survived the conflict in Guatemala but was forced to go into hiding for many years. Later Gustavo joined with the Nobel Peace Laureate, Rigoberta Menchú Tum, as the Director of the Rigoberta Menchú Tum Foundation. And in a remarkable twist of fate he is now the director of the Historic Archives of the National Police project, preserving and cataloguing the many thousands of police records that were discovered by accident in 2005. In a landmark case, Gustavo and his team’s work at the archives project led, in 2010, to the sentencing of two former police officers to 40 years in prison for the forced disappearance of Fernando Garcia.