Defenseless (1991)

Synopsis
In this suspense drama, a lawyer finds out more than she wanted to know about her friends and lovers. T.K. Katwuller (Barbara Hershey) is a lawyer with a firm command of her career but an unstable hold on her private life; she's more single than she'd like to be, and she's become romantically involved with one of her clients, Steven Seldes (J.T. Walsh), a real estate agent. When T.K. bumps into her college roommate Ellie (Mary Beth Hurt), she discovers that Ellie is Steven's wife, which T.K. hardly regards as welcome news. T.K. then learns that Steven has been accused of financing porn movies dominated by underage actors; after an angry confrontation, she bitterly breaks off the affair. The next day, Steven turns up murdered, and T.K. discovers that Ellie is the prime suspect. She agrees to handle Ellie's case, and Ellie is acquitted. However, T.K.'s conversations with police detective George Beutel (Sam Shepard) begin to plant a seed of doubt in her mind about Ellie's innocence. ~ Mark Deming, All Movie Guide