Russian lawyer Mark Feigin arrived in Kyiv to study the prospects of exchange of Ukrainian journalist Roman Sushchenko, who was detained in Moscow on suspicion of espionage. This was disclosed by Mark Feigin on a TV channel 112 Ukraine. He added that he does not know for whom Ukraine may exchange Sushchenko. The correspondent of "Ukrinform" in France Roman Sushchenko was arrested on September 30 in Moscow, where he was on a private visit.