Seven (1995)

Seen on 22-7-2009 - A Netflix dvd

Cast: Brad Pitt (Mills), Gwyneth Paltro (Tracy), Morgan Freeman (Sommerset), Kevin Spacey (John Doe, the serial killer)
Dir.: David Fincher ("The Curious Case of Benjamin Button")
Trying to hunt down a horrifying serial killer who has been killing innocent people because they are each guilty of one of the seven deadly sins, the two homicide detectives, young Mills and old Sommerset finally decode the clever clues left behind by the murderer. They reach the door steps of the killer who makes good his escape in the ensuing gunfire, while even saving the life of Mills. When at the end the killer surrenders of his own accord, he could have easily escaped the law by pleading insanity, but instead he takes them to a remote place to show the last victim (who happens to be Mills' wife herself). Provoked to extreme anger, Mills now shoots him dead by thus making him guilty of another of the seven deadly sins. Smart Sommerset sees through the game the murderer is playing and tries in vain to keep the younger man in check.
Here the perverted murderer is staging each of the seven murders to preach a sermon on each of the seven deadly sins because he is frankly disgusted that the world is hopelessly given over to these vices. He elaborately plans these grisly murders because he wants to force the world to take note and absorb the meaning of his sermons on the sins. He is clearly the cinematic kin to Hannibal Hector of "Silence of the Lambs".
As if to emphasize the dark underside of this grisly world, as if to underline that the world is shrouded under these sinister sins, David Fincher is said to have used a "film-processing technique that deepens the tonal qualities and makes harsher and brighter."
Well, I wouldn't rate highly this peek into the psychology of a pervert. It may be riveting alright.