Lyle Menendez was denied parole on Friday, a day after his brother Erik received the same outcome, extending their decades-long imprisonment for the 1989 murders of their parents in Beverly Hills.
A California parole board panel ruled that Lyle, despite being described as remorseful and a model inmate, still poses a risk to public safety.
Commissioner Julie Garland noted that while he has shown potential for change, he also continues to display anti-social personality traits, including deception and minimization of his actions.
The Menendez brothers were convicted in 1996 of killing their parents, Jose and Kitty Menendez, in their Beverly Hills home. Initially, they attempted to shift blame to organized crime before Erik confessed to his therapist.
Their defense later centered on claims of long-term abuse by their father and mother, while prosecutors argued the murders were driven by greed and the desire to secure a large inheritance.
The case drew national attention in the early 1990s, becoming one of the most watched trials in the United States.
It later inspired multiple documentaries and dramatizations, including a recent Netflix series.
In May, a Los Angeles judge reduced their sentence to 50 years to life, making them eligible for parole for the first time.
Both brothers will remain behind bars following this week’s back-to-back denials.