MOSCOW (AP) — The only official charged with the death of a Russian whistleblowing lawyer walked free on Friday after a Moscow court acquitted him of negligence, in a case that has become a rallying point for human rights advocates and sparked escalating legislation in the U.S. and Russia.

Sergei Magnitsky died in jail in 2009 after his pancreatitis went untreated, and an investigation by Russia’s presidential council on human rights concluded he was severely beaten and denied medical treatment. Prison doctor Dmitry Kratov was the only person to face trial in the case.

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