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.

Oziel confided in his mistress, Judalon Smyth, about the confession. Several months later, Smyth went to the police with the chilling details of the murders.

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.

Who is Judalon Smyth? 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, ...

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.

"Monsters: The Lyle and Erik Menendez Story" adapts the murder trial of Lyle Menendez and Erik Menendez. Leslie Grossman plays a witness in the trial, Judalon Smyth. Grossman said she deliberately did ...

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 ...