The Christo Files

The Christo Files publishes data‑driven investigative journalism, led by Christo Grozev, focused on Russian intelligence and covert operations in Europe. Recurring subjects include exposés of Russian Unit 29155 (poisonings, assassination and kidnapping plots, spy rings), covert infrastructure like “spy hotels,” Russia’s secret drone programs, and behind‑the‑scenes breakdowns of how these investigations are conducted using open‑source/data‑driven methods.