Tracking Putin’s most feared secret agency — from inside a Russian prison and beyond

When I was arrested by Russia’s security forces in 2023 — the first foreign correspondent charged with espionage since the Cold War — I never stopped reporting. On my release I set out to identify the man who had taken me, and to learn more about the spy unit that had carried out his orders.

During my 16 months’ imprisonment, colleagues at The Wall Street Journal had been asking parallel questions.

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