Monterroso, a petite 52-year-old with dark brown eyes, teaches the law to university students in an almost lawless nation. But it is her personal life that made her a target. She is the wife of Sergio Morales, Guatemala's human rights ombudsman.
For 3 1/2 years, Morales has been scouring and digitizing an extraordinary trove of millions of documents discovered by chance in a rotting warehouse. The archive contains the secret files of Guatemala's notorious national police agency.
Assassins have tried to silence Morales with bombs. They have tried to silence him with bullets.
None of that has worked.
So last month, they came for his wife.