The story of the investigation, which in the late eighties was carried out by the relatives of the victims, former prisoners of the GULAG, and security officials who had to deal with the heavy legacy left by the Cheka and the NKVD. The location of the shooting range has long been a public secret. Through the efforts of caring people, the place where the burial of the victims took place was established, and books were published in memory of those killed at the Butovo training ground. The details of how the terrible conveyor belt of murders without trial or investigation was organized was revealed.