Mystery around the death of a former aide to Russia's president Vladimir Putin is causing tension between Russia and the US. Last fall, Mikhail Lesin reportedly died of a heart attack at a hotel in Washington, D.C.  Last week, the coroner's report said it was actually blunt force trauma--to his head, neck, shoulders, arms, legs, and upper and lower torso.

In a strange twist, somebody used Lesin's passport to fly out of the United States in December--40 days after he died!

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