Who Killed KGB Agent Alexander Litvinenko? Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email A visitor looks at a painting showing former Russian spy Alexander Litvinenko, by Dmitry Vrubel and Viktoria Timofeyeva painters in the Marat Guelman gallery in Moscow, 23 May 2007. ( NATALIA KOLESNIKOVA/AFP / Getty ) Produced by Mythili Rao Produced by PRI and WNYC