1936- andreĭromanovich biography casestudies cheli͡abgipromez cheli͡abinsk chikatilo concertagents i͡uriĭmeerovich mentallyilloffenders murderers rostovskai͡aoblastʹ rostovskai︠a︡oblastʹ russia(federation) serialmurderers serialmurders sexcrimes trakhtenberg violentoffenders