Mamaev Sergei Olegovich

Mamaev Sergei Olegovich was born on March 11, 1980, lived in the city of Yoshkar-Ola, Mari El Republic, civil activist.

Presumably accused under Part 2 of Article 282.2 of the Criminal Code of the Russian Federation ("Participation in the activities of a public association or other organisation in respect of which a court has made a decision that has entered into legal force to liquidate or prohibit activities in connection with the implementation of extremist activity", up to 6 years in prison) of supporting one of the organisations of Alexei Navalny's supporters.

Deprived of liberty since July 22, 2025.