On December 1, 2021, Aliaksandr was detained in a criminal case initiated over participation in the protests held in Mazyr in August 2020. Police officers were recognised as victims in the case, the main one being Valentin Piller, head of the traffic police of the Mazyr District Police Department. At their request, the trial was held behind closed doors.
In April 2022, Aliaksandr was found guilty in a criminal case initiated under the articles "Organisation and preparation of actions grossly violating public order, or active participation in them" and "Violence or threat of violence against an internal affairs officer" and sentenced to imprisonment in a penal colony.
According to human rights defenders' calculations, he was released in January 2024, after fully serving the sentence imposed by the court.
