The movie Complicity was based on the book Complicity.
Movie details for Complicity
Actors on this movie include Jonny Lee Miller, Brian Cox, Keeley Hawes, Paul Higgins, Jason Hetherington, Bill Paterson, Samuel West, Laura Ellis (II), Alan Sinclair, Alex Norton, Valerie Edmond, Paul Young, Katy Hale, Alex Purves, Rachael Stirling, John Murtagh, Michael MacKenzie, Julie Austin, Stephen McCole and David Kerr (II).
Book details for Complicity
Local journalist Cameron Colley writes articles that are idealistic, from the viewpoint of the underdog. A twisted serial killer seems to have the same MO -- he commits brutal murders on behalf of the underdog. As the two stories begin to merge, Cameron finds himself inextricably and inexplicably implicated by the killer.
When the arms dealer whom Cameron plans to expose is found literally "disarmed" before Cameron can even put pen to paper and the brewery chief, loathed by Cameron, who sold out at the expense of his workers finds himself permanently unemployable, the police become convinced of Cameron's guilt, as do half his friends and colleagues, forcing Cameron to employ all his investigative skills to find the real killer and his motive.