w Delta z (2007)

A series of deaths have started occurring in New York; Some are being found mutilated while others have an equation wI"z = Cov (w,z) = AYwzVz carved onto their skin. As police investigate they discover each victim was forced to choose between sacrificing their own life or a loved ones' life. Before long it becomes clear that this perpetrator has suffered just such a similar fate…so now is coping by seeking a way of solving this philosophical enigma, can Captain Maclean and his officers such as Eddie Argo and his new partner Helen Westcott stop this suspect, because he/she won't not until he/she gets to the end of this equation.

Director: Tom Shankland
Stars: Barbara Adair, Stellan Skarsgard and Peter Ballance
Production land: UK
Premiere Date: 19 May 2007 Cannes Film Market
IMDb