The Velvet Touch (1948)

Broadway star Valerie Stanton, breaking up with her producer-lover Gordon Dunning, unintentionally kills him. In flashback, she recalls meeting new flame Michael Morrell, and Dunning's machinations leading to the fatal argument. The next day, it appears that Valerie's former rival Marian Webster is the prime suspect. Or is suave police Captain Danbury just playing cat and mouse with her? Nicely catty dialogue.