After Kirov's death, Stalin called for swift punishment of the traitors and those found negligent in Kirov's death. Nikolayev was tried alone and secretly by Vasili Ulrikh, Chairman of the Military Collegium of the Supreme Court of the USSR. He was sentenced to death by shooting on 29 December 1934, and the sentence was carried out that very night. The hapless Commissar Borisov died the day after Kirov's assassination, supposedly by falling from a moving truck while riding with a group of NKVD agents. According to Orlov, Borisov's wife was committed to an insane asylum and Nikolayev's mysterious "friend" and alleged provocateur, who had supplied him with the revolver and money, was later shot on Stalin's personal orders.