Military Collegium of the Supreme Court of the USSR
After Kirov's death, Stalin called for swift punishment of the traitors and those found negligent in Kirov's death. Borisov, one of the first to come upon the scene, was immediately arrested; he died the day after Kirov's assassination, allegedly as the result of a fall from a truck in which he was being transported by the NKVD. On 28-29 December 1934, Nikolaev and 13 other people as members of the "counterrevolutionary group" were tried by the Military Collegium of the Supreme Court of the USSR under Vasili Ulrikh's chairmanship. At 5:45 AM, 29 December, all of them were sentenced to death and executed by shooting an hour later.