But then, about six months after the crime, in March 1990, police got a tip from an unlikely source: Judalon Smyth, the girlfriend of a psychologist who Lyle and Erik Menendez had been talking to.

But then, about six months after the crime, in March 1990, police got a tip from an unlikely source: Judalon Smyth, the girlfriend of a psychologist who Lyle and Erik Menendez had been talking to.

Related: Monsters ' Leslie Grossman Would Be 'Happy to Talk to' Judalon Smyth If She 'Reached Out and Wanted to Meet' (Exclusive) "I want to protect this as much as possible.

Judalon was a key witness in the Menendez brother trial and was having an extramarital affair with Jerome Oziel. After he cut off the relationship, she told the police that Erik had confessed to ...

Leslie Grossman plays Judalon Smyth in Netflix's "Monsters." She told Business Insider why she hasn't spoken to the people the show is based on.

Leslie Grossman plays Judalon Smyth in Netflix's "Monsters." She told Business Insider why she hasn't spoken to the people the show is based on.

Judalon Smyth, played above by Leslie Grossman, was a witness in the Menendez brother's first trial. Courtesy Of Netflix Last week, Grossman told Business Insider that she wanted to be "as respectful" ...

Leslie Grossman plays a witness in the trial, Judalon Smyth. Grossman said she deliberately did not contact the real Smyth out of respect for her. Leslie Grossman said she purposely did not contact ...

Judalon Smyth was having an affair with Lyle and Erik Menendez's therapist, who told her about their confession to killing their parents. Here's everything to know about Judalon Smyth and where ...

Leslie Grossman as Judalon Smyth in episode 202 of 'Monsters: The Lyle And Erik Menendez Story' More During the 1993 trial, Smyth mainly testified about the tapes that Oziel had of the confessions.