Irina Gaidamachuk

In February 2012, the court case began in Yekaterinburg. Gaidamachuk gave a confession to the indictment during the preliminary investigation, but contested this throughout her trial. A forensic psychiatric examination conducted by GNTSSSP Serbsky showed that Gaidamachuk, although she showed some mental illness, was legally sane at the time of the murders.

In June 2012, Gaidamachuk was charged with 17 counts of murder and 1 count of attempted murder, and was sentenced to 20 years in prison. Relatives of the victims were outraged at the short length of the sentence, citing that Gaidamachuk received only just over a year per killing, adding that she should never be freed.

In 2010 Gaidamachuk attempted to kill another elderly woman, who managed to escape. The potential victim reported to the police that the killer had just attacked her and that they were female, which proved to be a vital clue as the police had assumed the killer was male. Gaidamachuk killed her final victim, Alexandra Povaritsyna, whose neighbor had seen her leave around the time of the murder. After the police received the information from Povaritsyna's neighbor, they arrested Gaidamachuk who quickly confessed to the killings. Another woman who had been initially suspected for the crimes, and after pressure from authorities, confessed to the murders. Gaidamachuk stated that she committed the murder-robberies to pay for vodka to feed her alcohol addiction, as her husband refused to give her money for it.

In 2002 Gaidamachuk began to murder elderly women around Sverdlovsk Oblast. She would pretend to be a social worker to gain access to the homes of the women, where she would kill them with an axe or hammer, then rob the victim for whatever money she could find. Gaidamachuk would sometimes set fire to the victim's home, attempting to cover her tracks, and would occasionally try to make the fire look like an accident. Police had linked the deaths together, but the investigation was slow and lacked many leads. The majority of the crimes were committed in Gaidamachuk's home town of Krasnoufimsk, with some being committed in Yekaterinburg, Serov, Achit and Druzhinino.

Irina Viktorovna Gaidamachuk (Russian: Ирина Викторовна Гайдамачук , born 1972) is a Russian serial killer who killed 17 elderly women in Sverdlovsk Oblast between 2002 and 2010.

Gaidamachuk was born in 1972, in the town of Nyagan, Khanty–Mansi Autonomous Okrug, Soviet Union. At a young age she became addicted to alcohol, and subsequently her parents were deprived of parental authority. She moved to Krasnoufimsk, Sverdlovsk Oblast in the early 1990s, where she met her husband Yuri, with whom she later had two children. Gaidamachuk's alcoholism was so extreme that Yuri reportedly would refuse to provide her with money out of fear that she would spend the money on alcohol.