Igor Sutyagin, an arms researcher, was one of the four Russians expelled from the country in a historic spy swap last week. Dmitry said he had a long phone conversation on Monday night with his brother, who is reportedly staying at a hotel in Britain with one of the other freed Russian spies Sergei Skripal. Sutyagin, Skripal and two other Russians convicted of spying for the West were exchanged on Friday in Vienna for 10 Russian agents deported from the United States.