Arctic Sea: hit man on way to U.S.?
Colonel Shcherbakov, a branch leader of Russia's Foreign Intelligence Service, fled Moscow to join his daughter and son in the United States
Kommersant , one of Moscow's most respected newspapers, quoted a source saying of the double agent: "We know who he is, and where he is. He betrayed either for money, or was caught for something. And there's no doubt that a Mercader has been sent for him."
Ramon Mercader was a Spanish Communist sent by Stalin to kill his political rival, Leon Trotsky. In 1940, Mercader visited Trotsky at his house in Mexico City. He killed him with a single blow of an ice ax.