In a recently published video, Alexey Navalny calls one of the FSB's operatives who participated in Navalny's poisoning, and, pretending to be his colleague, manages to record some evidence about the operation.
Now, Russia apparently is one of the one-party consent countries, where secretly recording a conversation you hold with someone is not illegal by itself. However, I would expect that to change is the other party is led to believe they are speaking with someone else.
I understand the circumstances are quite extraordinary, however, I think the legality of the recording is still a crucial aspect. Could Navalny face charges for releasing it, and would it be admissible as evidence in a court case?