Chikatilo.

He killed and went unpunished for more than ten years, and more than fifty people died at his hands. An innocent man was convicted and shot instead. For a long time, the murders he committed could not be combined into one case. Maniacs of this caliber simply did not exist in the USSR, so law enforcement agencies were not ready to fight the "Rabid Beast", as journalists later dubbed it. Vigilantes, police officers, investigators from the prosecutor's office, psychiatrists were involved in the capture of Chikatilo, and new investigative techniques were developed that will help save innocent people.