Angel Face (1953). Wealthy socialite Diane Trumane (Jean Simmons) doesn't get along with her stepmother Catherine. Her father Charles is a once-brilliant novelist whose career has stalled ever since he married Catherine. Diane is accusing her stepmother of trying to poison her by turning the gas on during the night.
One afternoon, Catherine meets an unfortunate accident as her car's automatic transmission doesn't work, it goes in-reverse, she crashes her car and dies. Diane and her chauffeur Frank Gessup (Robert Mitchum) are indicted on murder charges and she hires slimy attorney Frank Barrett to get her off the hook. Jean Simmon is spot-on as Diane, who's beautiful, compassionate, but also obsessive and manipulative when it comes to getting what she wants.