A US judicial commission has denied parole to Lyle Menendez, a day after his brother Erik was also ordered to stay in prison for the murder of their parents in a Beverly Hills mansion more than three decades ago.
A California panel ordered the 57-year-old to remain behind bars along with his younger sibling, defying a campaign for their freedom waged by family, friends and celebrities including Kim Kardashian.
"Joseph (Lyle) Menendez was denied parole for three years at his initial suitability hearing," read a brief statement from the California Department of Corrections and Rehabilitation (CDCR).
The outcome of Lyle Menendez's hearing is the latest blow to a movement that has swelled in recent years, amplified by Netflix's dramatic series 'Monsters: The Lyle and Erik Menendez Story'.

The show and myriad documentaries have fixated on the details of the 1989 shotgun murders, and the televised jury trial that captivated audiences with accounts of their upbringings and lifestyles.
Yesterday's hearing came just over 36 years after the deaths of parents Jose and Kitty Menendez, in what prosecutors said was a cynical attempt by their sons to obtain a large family fortune.
An 11-hour hearing
The brothers initially blamed the deaths on a mafia hit, but changed their story several times in the ensuing months.
Erik, then 18, confessed to the murders in a session with his therapist.
The pair ultimately claimed they had acted in self-defence after years of emotional and sexual abuse at the hands of their father.

During their decades in prison, changing social mores and greater awareness of sexual abuse helped elevate the men to something approaching cultural icons.
The hearing, which was closed to the public, lasted 11 hours. It was held separately to Thursday's hearing for his brother Erik, 54.
Both brothers appeared by video link from the San Diego prison where they are being held.
The panel members, whose identities were not released by CDCR, quizzed them on their behaviour and attitude towards the murders.
The parole hearings became possible when a judge earlier this year resentenced the men, reducing their original full-life punishment to one of 50 years with the possibility of release.
Accreditation: AFP