I was very disappointed after watching this picture. They took a historic case and made a dumbed down, stupid and at times insulting story.
On several occasions it tries to shock the audience by the killer being a communist, as if that would be worse than being a serial killer. Remember this is played out in the soviet state, being a communist was a very good thing and even required. The way the story is told is not at all fitting to the surroundings.
Not worth watching, go see Citizen X instead.