The stalker who killed his ex-girlfriend was previously involved in the case of preparing a terrorist attack in the Kazan Cathedral in St. Petersburg.
According to information from 112, Yagov and Gif Ogli Suleimanov (the killer's name) knew the organizer of the failed attack, Yevgeny Efimov. The latter told him about plans to rent a garage or other place to manufacture explosives. Later, Efimov told a friend that he was almost ready to commit a crime.
Suleimanov tried to dissuade his friend, but did not contact law enforcement. In December 2018, he was found guilty of not reporting a crime and fined 70,000 rubles.
We are talking about a terrorist attack that was prevented by FSB officers in December 2017. Supporters of the "Islamic State"* planned to carry out an explosion in the Kazan Cathedral. It was assumed that the suicide bomber would blow himself up during the service. The organizer Yevgeny Efimov was sentenced to five years in a maximum security colony.
The organization is recognized as terrorist and extremist, banned in the Russian Federation.
Major incidents - 112.