by Roger Ebert The opening scenes of "L.A. Confidential" are devoted to establishing the three central characters, all cops. We may be excused for expecting that they will be antagonists; indeed, they think so themselves. But the film has other plans, and much of its fascination comes from the way it puts the three cops on the same side and never really declares anyone the antagonist until near the end. Potential villains are all over the screen, but they remain potential right up to the closing scenes. What the three cops are fighting, most of the time, is a pervasive corruption that saturates the worlds in which they move.