The film is an adaptation of a novel, L.A. Confidential by James Ellroy.
In the novel we're given access to variety of documents from the LA Police Dept. Internal Affairs Division, literally marked LAPD 'Confidential'.
CONFIDENTIAL LAPD REPORT: Compiled by
Internal Affairs Division, dated 3/11/57
Investigating officer: Sgt. Donald Kieckner, badge 688, IAD. Submitted at the request of William H. Parker, Chief of Police
Subject: Vincennes, John, Sergeant, Surveillance Detail.
This, along with the privileged information we're getting from the 'Hush-Hush' scandal magazine means we're being given access to all the confidential information available.
His date that night was one Lynette Brown, age eighteen, a dusky deelite with two juvenile arrests for possession of marijuana. Lynette told a secret Hush-Hush correspondent, "Bill like his black. He say, 'Once you had black you can't go back.' He dig jazz and he like to party slow. He really married? He really distric' 'turney?"
He sure is, sweet thing. But for how much longer? There's a bunch of Thursdays between now and Election Day, and will Bad Bebop Billy be able to control his dark desires until then?
Remember, dear reader, you heard it first here--off the record, on the Q.T. and very Hush-Hush.