Blood Relatives and Mr Brooks

Two unusual films, both ending with unexpected twists and with more than a hint of film noir...

Donald Sutherland, as Inspector Carella, has to find the killer of a young girl whose cousin survived the attack.  Their family's wholesome public image hides a very different reality, and Carella slowly untangles a complex web of incest and ugly fantasy in Blood Relatives.

More about Blood Relatives:  http://www.imdb.com/title/tt0076313/

Kevin Costner, in Mr Brooks, plays restectable and highly successful businessman.  He has an invisible friend with whom he shares the hobby of murder.  They were about to call a halt to their activities when they acquire an unwanted side-kick (played by Dane Cook.)  Demi Moore excels in her role as a detective faced with a string of artistically-arranged corpses. 

More about Mr Brooks:  http://www.imdb.com/title/tt0780571/