Sergei Loznitsa’s “Two Prosecutors” is a nightmare of government corruption so perfectly composed that, by the time it reaches its chilling conclusion, you feel nearly as entrapped as its young protagonist, writes AP Film Writer Jake Coyle in his review. The film is set at the height of Stalin's Great Purge, in 1937. A young prosecutor just three months into the job attempts to visit a prisoner. It was not exactly an opportune time for a young lawyer hardly out of college to stroll into the belly of Stalin’s bureaucratic beast and start asking questions. What follows has the neatness of a dark parable of political persecution.