Sergei was arrested in March 2021 in connection with a criminal case opened under the article "intentional destruction of a vehicle or communication lines," and in October of that year, he was convicted of installing metal threads, wire, and other similar objects on railway tracks.
During the trial, he admitted guilt in only one incident, committed under personal circumstances—the loss of his child: he drove into the forest and short-circuited a track circuit using a wire. He pleaded not guilty to the other incidents, claiming he had incriminated himself during the investigation.
He was released in October 2023, having fully served his sentence as imposed by the court.
