[2] Subsequently, the interior minister of the homicide department of the Central Internal Affairs Directorate of St. Petersburg, Alexander Malyshev, who directly participated in the investigation of Sibiryakov's crimes, said the following about him:They could only take it to the construction site, but in the same place it's necessary to work.

He went there several times, with only construction clothes to wear and did not go out anymore...[2] Sibiryakov was characterized as extremely cowardly, being too afraid to confess to his wife that he had been fired from his job for absenteeism.

Sibiryakov committed each assault the same way: he introduced himself as an employee of the municipal engineering company "Lenenergo," then broke into apartments where there were only single women, killing and robbing them afterwards.

In just a few weeks, he committed six attacks; five of them (on Nadezhda Mironovich, Elena Aleksandrova, two women named Deyeva and Valentinova, and Tatyana Pavlova) were fatal.

In the other case, the victim, Viktoria Bodumyan, miraculously survived because, after striking her with a knife, the killer broke the handle.

Snatching money from the police car, the killer rushed to get away, crossing the railway tracks right in front of a train in order to escape law enforcement officers.