I read John Gregory Dunne's novel quite some time ago, and while the details of the tale - other than it's obvious use of the Black Dahlia murder as a fictionalised sub-plot - were no longer clear in my mind when I watched this film, the memory of being deeply impressed by the book were still very clear.
You would think a film version written by the novel's author and starring two modern giants of the screen would have success guaranteed, but Ulu Grosbad's adaptation of True Confessions is only partially successful. As you'd expect, the acting is first rate, especially from De Niro, cast against type as a measured, introspective priest, and the recreation of 40s America stands comparison with the likes of L. A. Confidential but, whereas the medium of literature enabled Dunne to bring a good measure of intrigue to the complexities of religious politics and finance, on the screen he struggles to hold the viewer's interest, while the Black Dahlia sub-plot is almost dismissively brushed aside.
Despite this, the plot reaches the screen with its intelligence and cynicism intact, relying on human interaction to drive the plot forward. Essentially a dissection of the relationship of two brothers, one a cop (Duvall) the other a sort of 'glamour priest' who weds wealthy couples and is earmarked for good things, the script steadfastly picks apart the threads of the brothers' lives to reveal the sensitivity and honour of the hard-bitten cop and the self-serving ability of the priest that enables him to turn a blind eye to all that he knows is rotten.
This is a film for adults. If you like gunplay or violence look elsewhere. But if you want to see a film that asks you to do a little work to understand the motivation and compulsions of its characters then this one will probably be worth a couple of hours of your time.
