MOSCOW, RUSSIA - NOVEMBER 2, 2017 Andrei Emelyanikov, an 18-year-old student, became obsessed with an internet game inspired by Silent Hill 4: The Room. Some sources say it was the infamous Blue Whale game. According to its rules, he had to commit a real-life murder. He chose as his victim his 44-year-old teacher Sergei Danilov.
He waited for the right opportunity and slit his teacher's throat in the classroom. Then, proudly, he took a photo of himself with his corpse. Probably so that he could send the photo to some group belonging to the game as proof that he had actually committed the murder.

Afterwards, Emelyanikov took his own life in a rather cruel way. He ran his throat through the circular saw. Supposedly, ending one's own life is also in the rules of the game.
Sergei Danilov was a former army officer and father of three children. He was described by all the students as the best and nicest teacher in the school. His death caused much grief and tears.