Grace Rubenstein | Longreads | April 2016 | 19 minutes (4,634 words)

Somewhere in Mexico, someone knows the answer to the question that drives Araceli García Luna day and night. The person or persons who know might be criminals or government officials—or both. The jagged beige mountains around the northern city of Monterrey, which hold so many horrible secrets, surely know. You would think, given the circumstances, that someone would help her find out.

Araceli lives in a small apartment on the outskirts of Mexico City. She gets up in the morning and goes to work in maintenance at a local middle school, the same job she’s had for 24 years. She comes home by 5 p.m. and stays there, with two of her grown children, her grandson, and a little frizzy-haired dog named Chiquitín. Araceli doesn’t go out anymore—not for events or unnecessary errands. Except that, once every…