Her contractor husband is found dead in her home and suspicion falls on Roth and Sunjata. It's a question of who will rat out who first. Roth really likes the sex she's getting from Sunjata although she's one of many women this admittedly charismatic man has been fooling around with.
Later when Roth is found dead of carbon monoxide poisoning of course suspicion falls on Sunjata. The man is one arrogant perpetrator who thinks he can get out of anything by his good looks and charm. A new girlfriend is an alibi witness.
The fancy lawyering comes in with Waterston doing a brilliant cross examination at a new trial for the murder of Roth. The horror of what she's doing is slowly realized. Waterston is brilliant here.
This story shows why Jack McCoy most of the time gets his perpetrator.