No country for old men- Crime Thriller

No country for old men is set in the country of America, following the work of a sheriff, a member of the police force. The set of the movie is well established at the begginning of the movie with a number of establishing shots, which clearly illustrate how lonely the area is.
We are instantly introduced to the Protagonist via a monologue, which tells the horrible story of a 14 year old boy who commited a crime, this raises questions to the veiwer, 'what kind of area is this' for example.
The audience see the protagonist in great peril in the police station, as the criminal he has caught subtly pulls his hands from behind his back to his front in order for him to be able to strangle the sherriff to death. The veiwer sees the criminal move and wants to warn the sheriff, but of course this is impossible. Because of this the scene seems very powerful, and shocks the veiwer.