“Monsters: The Lyle and Erik Menendez Story” is shining the spotlight on a completely separate murder – one that happened a decade before the brothers’ trial.

Episode 7 of the series – titled “Showtime” – features a long dinner party scene where Nathan Lane’s character Dominick Dunne breaks down the Menendez case as he sees it through the context of having sat through his own daughter’s murder trial. It’s also a trial that earned significant media attention a decade earlier.

Dunne’s daughter Dominique was a 22-year-old rising actor fresh off a lead role in 1982’s “Poltergeist.” She was strangled to death by her ex-boyfriend John Sweeney after their breakup on Oct. 30, 1982. Sweeney confessed to the murder – and an attempt to kill himself after – when the police arrived on the scene.

Here’s what we know about Dominique, the night she was killed, and where Sweeney and the rest of her family is today.