On 24 May 1940, Trotsky survived a raid on his villa by armed assassins led by the NKVD agent Iosif Grigulevich and Mexican painter David Alfaro Siqueiros. Trotsky's 14-year-old grandson, Vsevolod Platonovich "Esteban" Volkov (born 7 March 1926), was shot in the foot. A young assistant and bodyguard of Trotsky, Robert Sheldon Harte, disappeared with the attackers and was later found murdered; it is probable that he was an accomplice who granted them access to the villa. Trotsky's other guards fended off the attackers. Following the failed assassination attempt, Trotsky wrote an article titled "Stalin Seeks My Death" on 8 June 1940, in which he stated that another assassination attempt was certain.