What is the name of a black white movie about young girl who debutante and in love with an older man he takes her to prom.I think it was beginning C or L.?

Laura (1944) is a black-and-white film about a young woman named Laura Hunt (Gene Tierney), who is a debutante and in love with an older man named Waldo Lydecker (Clifton Webb). Lydecker takes Laura to her first prom, where she meets Shelby Carpenter (Dana Andrews), a detective investigating the murder of Laura's aunt, Ann Treadwell.