In a desperate attempt to capture their murderer, operatives of both sexes were disguised as couples and patrolled the parks around Frunze and Alamüdün. When it became clear that the offender was aware of their plan, since no attacks had taken place, the plan was dropped. On June 15, the final attack was reported: a young married couple had been attacked just outside Leninsky. Both of them had been hit from behind with a blunt object, with the husband, Yuri Perepyolkin, surviving, but his wife was dragged away, raped and then strangled in a nearby field. After killing Mrs. Perepyolkin, her killer stole two watches. Not long after, the killer tried to strike again, attacking a trio of druzhinniks, knocking out one of the men, but was warded off by the second, Nikolai Romanenko. While fleeing, the "demon" dropped his axe, which would later be used to track him down.
