"It must be asserted that to this day the circumstances surrounding Kirov's murder hide many things which are inexplicable and mysterious and demand a most careful examination. There are reasons for the suspicion that the killer of Kirov, Nikolaev, was assisted by someone from among the people whose duty it was protect the person of Kirov. A month and a half before the killing, Nikolaev was arrested on the grounds of suspicious behaviour, but he was released and not even searched. It is an unusually suspicious circumstance that when the Chekist [Borisov] assigned to protect Kirov was being brought for an interrogation, on 2 December 1934, he was killed in a car 'accident' in which no other occupants of the car were harmed. After the murder of Kirov, top functionaries of the Leningrad NKVD were relieved of their duties and were given very light sentences, but in 1937 they were shot. We can assume that they were shot in order to cover the traces of the organizers of Kirov's killing."